""A Treatise on Zoology: Introduction and Protozoa"" by E. Ray Lankester is a comprehensive guide to the study of animals, focusing specifically on the introductory concepts and the protozoa group. The book covers the basic principles of animal classification, anatomy, and physiology, as well as the history of zoology and the development of scientific methods used in the field. It goes on to provide an in-depth examination of protozoa, including their morphology, life cycles, and ecological significance. The text is accompanied by detailed illustrations and diagrams to aid in understanding. This book is an essential resource for students and professionals in the field of zoology, as well as anyone interested in the study of animals and their behavior.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.