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Book Reproduction and Development of Marine Invertebrates of the Northern Pacific Coast

Download or read book Reproduction and Development of Marine Invertebrates of the Northern Pacific Coast written by Megumi F. Strathmann and published by University of Washington Press. This book was released on 2017-10-01 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference work is designed to provide background information on an array of northeastern Pacific marine invertebrate species so that they can be more easily included in comparative studies of morphology, cell biology, reproduction, embryology, larval biology, and ecology. It is meant to serve biologists who are new to the field as well as experienced investigators who may not be familiar with the invertebrate fauna of the northern Pacific Coast. The species discussed in this volume are mostly from the cold temperate waters of the San Juan Archipelago, near Puget SOund and the Strait of Georgia, but the information and methods given will be useful in laboratories from Alaska to central California and applicable to some extend in other coastal or inland facilities. An introductory chapter discusses basic prodcedures for collecting and maintaining mature specimens, for initiating spawning, and for culturing embryos and larvae in the laboratory. Subsequent chapters summarize reproduction and development in thirty different invertebrate groups and provided ercent references through which additional information can be traced, cite monographs or keys needed to identify species, and give methods useful for studying an array of selected species. Available information on habitat, diet, reproductive mode, egg size, developmental pattern, developmental times, larval type, and conditions for settlement and metamorphosis is reported for over 450 species.

Book The Mollusks

    Book Details:
  • Author : Charles F. Sturm
  • Publisher : Universal-Publishers
  • Release : 2006
  • ISBN : 1581129300
  • Pages : 445 pages

Download or read book The Mollusks written by Charles F. Sturm and published by Universal-Publishers. This book was released on 2006 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mollusks have been important to humans since our earliest days. Initially, when humans were primarily interested in what they could eat or use, mollusks were important as food, ornaments, and materials for tools. Over the centuries, as human knowledge branched out and individuals started to study the world around them, mollusks were important subjects for learning how things worked. In this volume, the editors and contributors have brought together a broad range of topics within the field of malacology. It is our expectation that these topics will be of interest and use to amateur and professional malacologists.

Book Freshwater Mollusks of the World

Download or read book Freshwater Mollusks of the World written by Charles Lydeard and published by Johns Hopkins University Press. This book was released on 2019-04-02 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive resource on the biology and evolution of freshwater mollusks. There are more species of freshwater mollusks—well over 5,000—than all the mammal species of the world. Freshwater mollusks are also arguably the most endangered fauna on the planet. Yet few references exist for researchers, shell enthusiasts, and general readers who are interested in learning more about these fascinating creatures. In Freshwater Mollusks of the World, Charles Lydeard and Kevin S. Cummings fill that void with contributions from dozens of renowned mollusk experts. Touching on 34 families of freshwater gastropods (snails) and 9 families of freshwater bivalves (mussels and clams), each chapter provides a synthesis of the latest research on the diversity and evolutionary relationships of the family. The book also includes • a look at how evolving DNA sequencing data techniques help shed light on mollusk taxonomy • distribution maps of each family's biogeographic locales • a representative photo and distribution map for each of the freshwater mollusk families • the latest information on each family's conservation status—and how to reverse the habitat destruction, modification, and pollution that threatens it • a discussion of the ecological and economic damages caused by invasive mollusk species, as well as their role as disease vectors Mollusks provide us with amazing biogeographical insights: their ancient fossil record goes back over 500 million years, and their distribution patterns are a reflection of past continental and climate changes. The only comprehensive summary of systematic and biodiversity information on freshwater mollusk families throughout the world, this reference is a must for malacologists, limnologists, ichthyologists, stream ecologists, biogeographers, and conservation biologists. Contributors: Christian Albrecht, Rüdiger Bieler, Bert Van Bocxlaer, David C. Campbell, Stephanie A. Clark, Catharina Clewing, Robert H. Cowie, Kevin S. Cummings, Diana Delicado, Hiroshi Fukuda, Hiroaki Fukumori, Matthias Glaubrecht, Daniel L. Graf, Diego E. Gutiérrez Gregoric, Kenneth A. Hayes, Yasunori Kano, Taehwan Lee, Charles Lydeard, Nathaniel T. Marshall, Paula M. Mikkelsen, Marco T. Neiber, Timea P. Neusser, Winston Ponder, Michael Schrödl, Alena A. Shirokaya, Björn Stelbrink, Carol A. Stepien, Ellen E. Strong, Maxim V. Vinarski, Amy R. Wethington, Thomas Wilke

Book Oceanography and Marine Biology

Download or read book Oceanography and Marine Biology written by R. N. Gibson and published by CRC Press. This book was released on 2006-06-13 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: With increasing interest in the field and its relevance in global environmental issues, Oceanography and Marine Biology: An Annual Review provides authoritative reviews that summarize results of recent research in basic areas of marine research, exploring topics of special and topical importance while adding to new areas as they arise. This volume, part of a series that regards the all marine sciences as a complete unit, features contributions from experts involved in biological, chemical, geological, and physical aspects of marine science. Including a full color insert and an extensive reference list, the text is an essential reference for researchers and students in all fields of marine science.

Book Phylogeny and Evolution of the Mollusca

Download or read book Phylogeny and Evolution of the Mollusca written by Winston Ponder and published by Univ of California Press. This book was released on 2008-03-25 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Ponder and Lindberg provides a breathtaking overview of the evolutionary history of the Mollusca, effectively melding information from anatomy, ecology, genomics, and paleobiology to explore the depths of molluscan phylogeny. Its outstanding success is due to thoughtful planning, focused complementary contributions from 36 expert authors, and careful editing. This volume is a must for malacologists."—Bruce Runnegar, Department of Earth and Space Sciences, University of California, Los Angeles "Our understanding of the phylogeny and evolutionary history of the mollusca has been revolutionized over the past two decades through new molecular data and analysis, and reinvestigation of morphological characters. In this volume Ponder, Lindberg, and their colleagues do a wonderful job of integrating this work to provide new perspectives on the relationships of the major molluscan clades, their evolutionary dynamics, and their history. Particularly timely is the coverage of molluscan evo-devo and genomics."—Douglas H. Erwin, Curator of Paleozoic Invertebrates, National Museum of Natural History

Book The Evolution of Primary Sexual Characters in Animals

Download or read book The Evolution of Primary Sexual Characters in Animals written by Janet Leonard and published by Oxford University Press. This book was released on 2010-07-16 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt: Primary sexual traits, those structures and processes directly involved in reproduction, are some of the most diverse, specialized, and bizarre in the animal kingdom. Moreover, reproductive traits are often species-specific, suggesting that they evolved very rapidly. This diversity, long the province of taxonomists, has recently attracted broader interest from evolutionary biologists, especially those interested in sexual selection and the evolution of reproductive strategies. Primary sexual characters were long assumed to be the product of natural selection, exclusively. A recent alternative suggests that sexual selection explains much of the diversity of "primary" sexual characters. A third approach to the evolution of reproductive interactions after copulation or insemination has been to consider the process one of sexual conflict. That is, the reproductive processes of a species may reflect, as does the mating system, evolution acting on males and on females, but in different directions. In this volume, authors explore a wide variety of primary sexual characters and selective pressures that have shaped them, from natural selection for offspring survival to species-isolating mechanisms, sperm competition, cryptic female choice and sexual arms races. Exploring diverse reproductive adaptations from a theoretical and practical perspective, The Evolution of Primary Sexual Characters will provide an unparalleled overview of sexual diversity in many taxa and an introduction to the issues in sexual selection that are changing our view of sexual processes.

Book Reproductive Biology of Invertebrates  Accessory Sex Glands

Download or read book Reproductive Biology of Invertebrates Accessory Sex Glands written by and published by John Wiley & Sons. This book was released on 1993-03-02 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reproductive Biology of Invertebrates Volume III Accessory Sex Glands Edited by K. G. Adiyodi Accessory Sex Glands is the third volume in the encyclopaedic series and provides very valuable information, some hitherto unpublished, on the distribution, structure, origin physiology, biochemistry, pharmacology and evolution of the accessory sex glands in different groups of invertebrates. Volumes I and II of this series (published by Wiley) have given detailed accounts of the structure, origin, composition and physiology of female and male gametes and also provided some information on the mechanisms controlling their production. The secretions of accessory sex glands are indispensable for several key aspects of gamete physiology and for successful fertilization and development in many internally fertilizing invertebrates. Interestingly enough, accessory sex gland secretions are produced, in some species at least, under the influence of gonadotrophic hormones as are the gametes themselves. The data on invertebrate accessory sex glands are scattered in various journals and have not been so far collected, critically evaluated and published in book form. This volume thus fills a void and serves as an indispensable corollary and companion to the two volumes that have already appeared on gametology in the series. Contents: Series Preface Preface to Volume III Systematic Resume of the Invertebrates Platyhelminthes--Turbellaria, S.S. Guraya and V.R. Parshad; Nemertina, M. Gontcharoff; Gnathostomulida, Marlene Mainitz; Rotifera, John J. Gilbert; Gastrotricha, W.D. Hummon and M.R. Hummon; Nematoda, L.A. Fitzgerald and W. Eugene Foor; Acanthocephala, David W.T. Crompton; Mollusca, N.W. Runham; Annelida, K.G. Adiyodi; Onychophora, Hilke Ruhberg and Volker Storch; Arthropoda--Crustacea, K.G. Adiyodi and G. Anilkumar; Arthropoda--Insecta, Cedric Gillott; Arthropoda--Myriapoda, J.M. Demange; Pentastomida, John Riley. Species Index. Subject Index.

Book Ecology

    Book Details:
  • Author : W. D. Russell-Hunter
  • Publisher : Elsevier
  • Release : 2013-09-24
  • ISBN : 1483276090
  • Pages : 716 pages

Download or read book Ecology written by W. D. Russell-Hunter and published by Elsevier. This book was released on 2013-09-24 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Mollusca, Volume 6: Ecology provides an overview of the state of knowledge in molluscan ecology. It is part of a multivolume treatise that covers the fields of biochemistry, physiology, neurobiology, reproduction and development, evolution, ecology, medical aspects, and structure. The Mollusca is intended to serve a range of disciplines: biological, biochemical, paleontological, and medical. As a source of information on the current status of molluscan research, it should prove useful to researchers of the Mollusca and other phyla, as well as to teachers and qualified graduate students. The book contains 15 chapters, arranged into three levels of ecological perspective: (a) distributional studies; (b) physiological ecology and bioenergetics; and (c) population genetics and dynamics. A discussion of the planetary distribution of and ecological constraints upon the mollusca is followed by separate chapters on the life styles and distribution of mollusks on the deep-sea bottom, in mangroves, and on coral reefs; and the trophic and reproductive ecology of those intrinsically fascinating molluscan groups—the nudibranchs and cephalopods. Subsequent chapters present physiological ecology in land snails and in freshwater bivalves, prosobranchs, and pulmonates, with a survey of the techniques of actuarial bioenergetics as applied to nonmarine molluscs. Other chapters cover population dynamics and biology in an introduced pest species, population genetics of marine molluscs, ecogenetics of land snails, and life-cycle pattems throughout the major molluscan taxa.

Book Faunal Ecology and Conservation of the Great Nicobar Biosphere Reserve

Download or read book Faunal Ecology and Conservation of the Great Nicobar Biosphere Reserve written by Chandrakasan Sivaperuman and published by Springer Nature. This book was released on 2022-11-22 with total page 665 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited book brings out a comprehensive account of the faunal diversity in Great Nicobar Biosphere Reserve which is part of the Sundaland Biodiversity hotspot. The main focus of this volume is to address the ecological and economic significance of the biodiversity of this region. The book provides latest information on the faunal diversity of Great Nicobar Biosphere. It focuses on various faunal communities of this regions such as Floral diversity, Butterflies, Moths, Dragonflies & Damselflies, Termites, Hymenoptera, Coleoptera, Scorpion, Spiders, Turtle, Nicobar megapode. Chapters in this volume also covers Reptiles & Amphibians, Fishes, Mammals, Land and freshwater Mollusca. Marine animals such as Opisthobranchs, Sponges, Scleractinian Corals and Soft corals, Sea Anemones, Polyclads, Marine Molluscs, Echinoderms are also discussed. It is of interest for the researchers, teachers, scientists, capacity builders, policy makers. Also serve as reading materials for graduate and post graduate students e.g., Wildlife Biology, Forestry, Environmental Science, Wildlife Ecology, Zoology, Life sciences, Parks/Sanctuaries managers, National and International scientists, policy makers will also find this to be a useful document.

Book A Student s Guide to the Seashore

Download or read book A Student s Guide to the Seashore written by J. D. Fish and published by Cambridge University Press. This book was released on 1996-06-06 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: Students and naturalists are not only interested in which species live on the seashore but also about their biology. How does a particular species reproduce? What is its life cycle? A Student's Guide to the Seashore is a unique, concise, illustrated guide to both the biology and identification of over 600 common and widespread shore animals and plants. In this new edition, for the first time, simple keys are included to allow accurate identification, and each species is beautifully illustrated by the author's line drawings. Together with concise summaries of diagnostic features, and notes on biology, this is the first comprehensive guide to the seashore giving a fascinating insight into the diversity and complexity of life on the shore. An extensive glossary of scientific terms and complete bibliography ensure that this book will be the premier biological text and identification guide for many years to come.

Book The Light and Smith Manual

    Book Details:
  • Author : James T. Carlton
  • Publisher : Univ of California Press
  • Release : 2023-09-01
  • ISBN : 0520930436
  • Pages : 1028 pages

Download or read book The Light and Smith Manual written by James T. Carlton and published by Univ of California Press. This book was released on 2023-09-01 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Fourth Edition of The Light and Smith Manual continues a sixty-five-year tradition of providing to both students and professionals an indispensable, comprehensive, and authoritative guide to Pacific coast marine invertebrates of coastal waters, rocky shores, sandy beaches, tidal mud flats, salt marshes, and floats and docks. This classic and unparalleled reference has been newly expanded to include all common and many rare species from Point Conception, California, to the Columbia River, one of the most studied areas in the world for marine invertebrates. In addition, although focused on the central and northern California and Oregon coasts, this encyclopedic source is useful for anyone working in North American coastal ecosystems, from Alaska to Mexico. More than one hundred scholars have provided new keys, illustrations, and annotated species lists for over 3,500 species of intertidal and many shallow water marine organisms ranging from protozoans to sea squirts. This expanded volume covers sponges, sea anemones, hydroids, jellyfish, flatworms, polychaetes, amphipods, crabs, insects, snails, clams, chitons, and scores of other important groups. The Fourth Edition also features introductory chapters on marine habitats and biogeography, interstitial marine life, and intertidal parasites, as well as expanded treatments of common planktonic organisms likely to be encountered in near-to-shore shallow waters.

Book Culture of Marine Invertebrate Animals

Download or read book Culture of Marine Invertebrate Animals written by Matoira H. Chanley and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is based on prec'entations at the conference on Culture of Marine Invertebrate Animals which was held in Green port, New York in October, 1972. The conference was sponsored by the Middle Atlantic Natural Sciences Council, Inc., a non profit educational corporation, together with the Marine Science Centers of Adelphi University, the State University of New York at Stony Brook, Long Island University, Suffolk County Community College, and the Shelter Island Oyster Company. The purpose of the conference was to provide a needed ex change of knowledge among scientists of various specialties whose information would be invaluable to others confronted with similar problems, even with different marine animals. Part I considers supportive techniques -- general isolation and culture methods, problems of disease and feeding. Specific techniques employed in the culture of a wide range of invertebrate organisms is covered in Part II. We want to thank the contributors for their cooperation in preparing the manuscripts based on their conference presentations. Walter L. Smith Matoira H. Chanley v Contents PART I Recirculating System Culture Methods for Marine Organisms .............•.

Book The Marine Biology of the South China Sea III

Download or read book The Marine Biology of the South China Sea III written by Brian Morton and published by Hong Kong University Press. This book was released on 1998-07-01 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first conference on the Marine Biology of the South China Sea was convened in Hong Kong in 1990, to celebrate the opening of the Swire Institute of Marine Science. The second was convened in Guangzhou, China, in 1993. The third conference returned toHong Kong in 1996 and, in a continuing pattern of growth, was attended by 127 scientists and students from 14 countries and territories. Of the 1O4 keynote addresses, papers and posters presented at the meeting, 42 are published here, following critical peer review, under the symposium categories of Taxonomy and Biological Diversity, Biology and Ecology and Coastal Zone Management and Conservation of the Biological Resources, of the South China Sea.Each conference sets its own symposia themes but in view of the rapid, perceived, decline in the marine environment of the South China Sea and the overexploitation of its resources, the 1996 meeting focused its attention on these issues.There are many meetings related to marine science convened by the countries of the South China rim. Some are national, others are international, but most are typically convened by agencies and attendance is restricted to an invited few, usually senior scientists. Europe hosts a European Marine Biology Symposium, that is convened in a different country each year and which sets the meeting's themes. The proceedings of those meetings constitute one of the most authoritative accounts of the marine biology of European waters. The meeting itself provides a forum for scientists and students, so that international collaborative research is now a key feature of European marine science. First convened in 1996, the 32 symposia are a tribute to international co-operation in research in a marine environment that, of itself, knows no boundaries.The South China Sea countries also need such a forum, free of political dogma. This conference proceedings is the third to help promote such an event, hopefully, one day, at a greater frequency than three years. The fourth conference is to be convened in the Philippines in 1999.This volume then is an international perspective on the South China Sea by scientists who research it and are concerned for its future. It contains information that should appeal to marine biologists throughout the world and, in particular, to those in Asia.

Book Neurobiology and Behavior

    Book Details:
  • Author : A. O. Dennis Willows
  • Publisher : Academic Press
  • Release : 2013-10-22
  • ISBN : 1483275507
  • Pages : 434 pages

Download or read book Neurobiology and Behavior written by A. O. Dennis Willows and published by Academic Press. This book was released on 2013-10-22 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Mollusca, Volume 8: Neurobiology and Behavior, Part 1, provides an overview of the state of knowledge in molluscan neurobiology and behavior. It is part of a multivolume treatise that covers the areas of structure and function, metabolic biochemistry, molecular biomechanics, environmental biochemistry, physiology, ecology, reproduction and development, neurobiology and behavior, and evolution. The Mollusca is intended to serve a range of disciplines—zoology, biochemistry, physiology, and paleontology. It will prove useful to researchers and to all others with interests in molluscs. The book contains four chapters and begins with a chapter on the behavior of gastropod mollusks. Subsequent chapters deal with learning in gastropod mollusks, the neuronal control of behavior in gastropods, and the development and plasticity of molluscan neurons.

Book Gulf of Mexico Origin  Waters  and Biota

Download or read book Gulf of Mexico Origin Waters and Biota written by Darryl L. Felder and published by Texas A&M University Press. This book was released on 2009-06-29 with total page 1449 pages. Available in PDF, EPUB and Kindle. Book excerpt: This landmark scientific reference for scientists, researchers, and students of marine biology tackles the monumental task of taking a complete biodiversity inventory of the Gulf of Mexico with full biotic and biogeographic information. Presenting a comprehensive summary of knowledge of Gulf biota through 2004, the book includes seventy-seven chapters, which list more than fifteen thousand species in thirty-eight phyla or divisions and were written by 138 authors from seventy-one institutions in fourteen countries. This first volume of Gulf of Mexico Origin, Waters, and Biota, a multivolumed set edited by John W. Tunnell Jr., Darryl L. Felder, and Sylvia A. Earle, provides information on each species' habitat, biology, and geographic range, along with full references and a narrative introduction to the group, which opens each chapter.

Book Reproduction of Marine Invertebrates V4

Download or read book Reproduction of Marine Invertebrates V4 written by Arthur Giese and published by Elsevier. This book was released on 2012-12-02 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reproduction of Marine Invetebrates, Volume IV Molluscs: Gastropods and Cephalopods describes the wide range of structural complexity and diverse modes of reproduction of gastropods and cephalopods. Each chapter discusses the asexual reproduction, sexual reproduction capacity, and developmental stages of different group of gastropods and cephalopods, including prosobranchia, opisthobranchia, pulmonata, nautiloidea, decapoda, and octopoda. Gastropods are among the most conspicuous sea animals, and species of limpets, snails, and slugs are found in all marine habitats. Cephalopods are active and important marine predators, ranging from archaic nautiloids to more recent pelagic decapods and benthic octopods, which are often considered to be one of the apexes of invertebrate evolution. They are all gonochoric and reproduce only by sexual means. All have intricate courtship behavior and derived developmental patterns. Marine biologists and researchers, scientists, and developmental biologists will find this book invaluable.

Book Evolution

    Book Details:
  • Author : E. R. Trueman
  • Publisher : Academic Press
  • Release : 2013-10-22
  • ISBN : 1483289362
  • Pages : 512 pages

Download or read book Evolution written by E. R. Trueman and published by Academic Press. This book was released on 2013-10-22 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: FROM THE GENERAL PREFACE: This multivolume work, The Mollusca, had its origins in the mid 1960s with the publication of two volumes entitled Physiology of Mollusca and edited by Wilbur and Yonge. In those volumes, 27 authors collaborated to summarize the status of the conventional topics of physiology as well as biochemistry, reproduction and development, and ecology. Within the past two decades, there has been a remarkable burgeoning of molluscan research generally and with it the development of new fields of investigation. During the same period, several excellent books on molluscs have appeared. However, they do not provide adequate information on the many recent advances or give the breadth of perspective of current knowledge of the phylum. Clearly, there was need for a larger work with a comprehensive treatment of major areas of molluscan research. The Mollusca, as a series of 12 volumes, attempts to fulfill this objective. Even here, practical considerations have meant that certain aspects of molluscan research have not been included.Each major area is treated by several authors, each reviewing his or her special field. The areas are structure and function, metabolic biochemistry, molecular biomechanics, environmental biochemistry, physiology, ecology, reproduction and development, neurobiology and behavior, and evolution. Throughout, the authors have given emphasis to recent advances and present status of molluscan biology. In so doing, directions of future research have become evident.The Mollusca is intended to serve several disciplines--zoology, biochemistry, physiology, and paleontology. It will prove useful to researchers and to all others with interests in molluscs.FROM THE PREFACE TO VOLUME 10: Recent events that have stimulated a great surge of investigation into the evolution of the Mollusca include the discovery of well-preserved microscopic molluscs at most levels of the Cambrian on five continents, the development of electron microscopy, the need to examine competing models of the early history of the phylum, new interest in interstitial fauna of littoral and near-littoral sands, and significant advances in our knowledge of shell ontogeny, construction, and evolution. It is timely that an up-to-date synthesis involving both paleontologists and zoologists should be published after a decade of such activity and advance when many of the long-held views on molluscan phylogeny have been overturned.This book deals with all molluscan classes except the Cephalopoda, which will be treated in Volume 12. The two books together provide an up-to-date introduction to the evolution of the Mollusca with adequate references to guide further work. They will be invaluable to specialists on molluscs, postgraduate research workers, and undergraduates with particular interests in this phylum. Authorities on the various molluscan groups were asked to express their views and to treat the subject as they wished; the book provides a valuable record of their opinions at this time.While the main groups are broadly and fully treated, focus has been narrowed toward a few selected minor groups of particular interest such as limpets, land snails, and the Anomalodesmata, in which recent work has been particularly significant.Because recent years have seen major revisions in classificatory terms, the editors have provided an outline classification into which the chapter topics fit. A New Synthesis of Recent Findings...Volume 10 examines important recent findings on the evolution of molluscs resulting from important new evidence in the fossil record. Paleontologists and zoologists present a synthetic treatment of all classes of the Mollusca (except the Cephalopods, covered in Volume 12). Topics include:molluscan origin and early evolutionthe evolution of Gastropoda and Bivalviaassessment of limpets, land snails, and the Anomalodesmata.