The basis of the subject matter in this book is necessarily morphological. The author has described the appearance of nearly all the invertebrates. It has been author’s earnest behaviour to present all the important aspects of zoology in a well-balanced account. The book will serve to suggest to the imagination of young students the poetic side of animal life and of nature generally. This books is extremely useful to the students of Zoology, Science and Agriculture, Scientists, agriculturists and horticulturists will also find this book helpful and useful.