A Treatise On Zoology Part 1 Fascicle 1 Introduction And Protozoa

Author : Ray Lankester
Publisher : Forgotten Books
ISBN 13 : 9781330282670
Total Pages : 320 pages
Book Rating : 4.2/5 (826 download)

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Download or read book A Treatise on Zoology, Vol. 1 written by Ray Lankester and published by Forgotten Books. This book was released on 2015-06-12 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from A Treatise on Zoology, Vol. 1: Introduction and Protozoa There are certain matters which require brief treatment by way of introduction to the present treatise on Zoology. The first concerns the limitation of the subject-matter indicated by the term Zoology," requiring a statement of what living things arc here considered .os animals and what are excluded from that title. The second concerns the grouping of animals in large series corresponding to the indications afforded by their structure as to their genetic affinities. Tho method adopted in the present work has been to take large divisions of the Animal scries such as are often called " sub-kingdoms " or " phyla " (or in some instances less comprehensive divisions) one by one for systematic description and for more detailed enumeration and justification of the classes, orders, and families recognised than is usual in handbooks of Zoology. These large divisions have been assigned for treatment to separate authors, and in each case the author has given a description of the characters which justify the recognition of the group which he treats as an independent series; to this he has added a more extended discussion of the rauge of variety in the structure of the fortns held to be reasonably considered as members of the series. A special chapter written by me forms the introduction to volume ii. of this work. It may bo regarded as a continuation of the present chapter, and treats of the division of the higher grade of animals, which is called the Metazoa (tho lower being the Protozoa), into two branches, the "Parazoa" and the "Enterozoa." It is, however, chiefly occupied with a discussion of the division of the Entcrozoa into two grades of higher and lower structural complexity, which are designated respectively the "Enterocoela" and "Coelomocoela." The chief phyla or large branches of the animal pedigree arc there enumerated, whilst each is subsequently treated by independent authors. 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.