Download or read book A Contribution to the Physiology of the Fresh water Sponges Spongillidae written by Herman van Trigt and published by . This book was released on 1919 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Contribution to the Physiology of the Fresh water Sponges Spongillidae written by H. van Trigt and published by . This book was released on 1914 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Contribution to the Physiology of the Fresh Water Sponges Spongillidae written by Herman van Trigt and published by Sagwan Press. This book was released on 2018-02-07 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book A contribution to the physiology of the fresh water sponges Spongillidae written by Herman van Trigt and published by . This book was released on 1919 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Contribution to the Physiology of the Fresh Water Sponges Spongillidae written by Herman van Trigt and published by . This book was released on 1919 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CONTRIBUTION TO THE PHYSIOLOGY OF THE FRESH WATER SPONGES SPONGILLIDAE written by HERMAN VAN. TRIGT and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Contribution to the physiology of the fresh water sponges Spongillidae proefschrift door Herman Van Trigt written by Herman Van Trigt and published by . This book was released on 1919 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CONTRIBUTION TO THE BIOLOGY OF THE FRESHWATER SPONGES SPONGILLIDAE written by MARCUS CALVIN OLD and published by . This book was released on 1930 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comprehensive Revision of a Worldwide Collection of Freshwater Sponges Porifera Spongillidae Classic Reprint written by J. T. Penney and published by Forgotten Books. This book was released on 2018-02-18 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Comprehensive Revision of a Worldwide Collection of Freshwater Sponges (Porifera, Spongillidae) In spite of the fact that serious scientific efforts in the taxonomic study of freshwater sponges were begun in the mid-19th century, and that a great number of subsequent investigators have contributed a massive amount of additional descriptive information, the taxonomy of this group has remained in a most chaotic state. Following Bowerbank's (1863) initial revision of all species of Spongilla, Gray (1867) was first to establish useful criteria for their generic differen tiation and to erect six new genera in addition to Spongilla Lamarck. Unfortunately, this system was criticized and its validity questioned by Carter (1881a), who claimed that Gray established his new genera without having seen Bowerbank's material upon which they were erected. Although fully unjustified in doing so, Carter (1881a) alto gether ignored Gray's existing generic names and devised his own system for the inclusion of Bowerbank's species and subsequently collected material. Thus it happened that Gray's well-established genera fell into complete obscurity for many decades, and Carter's system became firmly established, without being seriously challenged by any subsequent taxonomist. From the turn of this century, several attempts were made to revise comprehensively the status of the ever increasing numbers of species. After the publication of the first bibliography of all freshwater sponges by Weltner it was chiefly Annandale (1906 - 1919) who began to build the foundations to an improved and modernized knowledge of spongillid taxonomy. Annandale reestablished some of Gray's generic names, at least at a subgeneric level, and added a number of well-defined new genera to the conglomerate systems of Gray and Carter. Additional revisions were subsequently undertaken by Gee (1926 Schroder (1926 and Arndt (1923 to name just the most important contributors. Generic revisions were attempted by De Laubenfels (1936) and Jewell However, in spite of the fact that all these investigations have certainly helped to overcome a number of taxonomic difficulties, they seemed to have little effect on the stability of taxonomic nomenclature. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Comprehensive Revision of a Worldwide Collection of Freshwater Sponges Porifera written by J. T. Penney and published by Trieste Publishing. This book was released on 2017-07-26 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trieste Publishing has a massive catalogue of classic book titles. Our aim is to provide readers with the highest quality reproductions of fiction and non-fiction literature that has stood the test of time. The many thousands of books in our collection have been sourced from libraries and private collections around the world.The titles that Trieste Publishing has chosen to be part of the collection have been scanned to simulate the original. Our readers see the books the same way that their first readers did decades or a hundred or more years ago. Books from that period are often spoiled by imperfections that did not exist in the original. Imperfections could be in the form of blurred text, photographs, or missing pages. It is highly unlikely that this would occur with one of our books. Our extensive quality control ensures that the readers of Trieste Publishing's books will be delighted with their purchase. Our staff has thoroughly reviewed every page of all the books in the collection, repairing, or if necessary, rejecting titles that are not of the highest quality. This process ensures that the reader of one of Trieste Publishing's titles receives a volume that faithfully reproduces the original, and to the maximum degree possible, gives them the experience of owning the original work.We pride ourselves on not only creating a pathway to an extensive reservoir of books of the finest quality, but also providing value to every one of our readers. Generally, Trieste books are purchased singly - on demand, however they may also be purchased in bulk. Readers interested in bulk purchases are invited to contact us directly to enquire about our tailored bulk rates.
Download or read book Comprehensive Revision of a Worldwide Collection of Freshwater Sponges written by James Theophilus Penney and published by . This book was released on 1968 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Racek seems to have authored much of this work after the death of J. T. Penney and undertook a study and review of Penny's huge colleciton of material and unpublished data at the recommendation of B. Theodore Cole of the University of South Carolina. In view of the voluminous material available, Racek found it imperative to revise all true gemmule-producing species rather than elaborate Penny's outlined account of the Meyeninae and as a result of the study, demonstrated the fallacy of a subdivision of the family Spongillidae by using gemmosclere characteristics.
Download or read book Part 1 Taxonomy and Distribution of the Fresh water Sponges Spongillidae of Michigan written by Marcus Calvin Old and published by . This book was released on 1933 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Taxonomy and Distribution of the Fresh water Sponges Spongillidae of Michigan written by Marcus C. Old and published by . This book was released on 1930 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Taxonomy and Distribution of the Fresh water Sponges spongillidae of Michigan Environmental Selection of the Fresh water Sponges spongillidae of Michigan Contribution to the Biology of Fresh water Sponges spongillidae Observations on the Sisyridae neuroptera Marcus C Old a Dissertation for the Degree of Doctor of Philosophy in the University of Michigan written by Marcus C. Old and published by . This book was released on 1932 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Cell Biology of Sponges written by T.L. Simpson and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modem biology owes much to the study of favorable model systems which fa cilitates the realization of critical experiments and results in the introduction of new concepts. Examples of such systems are numerous and studies of them are regularly recognized by the scientific community. The 1983 Nobel Prize in Med icine and Physiology is a magnificent example in which com plants served as the experimental model. In a manner somewhat more modest, other biological systems have attracted recognition due to their critical phylogenetic position, or indeed because of their uniqueness which distinguishes them from all other organisms. Assuredly, among the whole assemblage ofliving organisms, sponges stand out as worthy of interest by scientists: they are simultaneously models, an important group in evolution, and animals unlike others. As early as the beginning of this century, sponges appeared as exceptional models for the study of phenomena of cell recognition. Innumerable works have been dedicated to understanding the mechanisms which assure the reaggregation of dissociated cells and the reconstitution of a functional individual. Today, re search on these phenomena is at the ultimate, molecular level. Through an as semblage of characteristics the sponges are, based upon all available evidence, the most primitive Metazoans. Their tissues-perhaps one can say their cell groups-are loosely assembled (they possess no tight or gap junctions), cell dif ferentiation appears highly labile, and they do not develop any true organs. But, they are most certainly Metazoans.
Download or read book Taxonomy and Distribution of the Fresh water Sponges Spongillidas of Michigan written by Marcus Calvin Old and published by . This book was released on 1932 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Section of Sciences written by Koninklijke Nederlandse Akademie van Wetenschappen. Afdeling Natuurkunde and published by . This book was released on 1918 with total page 1408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
