Zoology is the science of animals. It teaches their nature and properties, their classification and their order of succession upon and their distribution over the earth. A knowledge of the nature of animals as it implies that of their organisation and of the functions and interdependencies of their components parts, constitutes the two great branches of Zoology, called Zootomy or comparative anatomy and physiology. The term zoology is practically restricted to the science of the outward characters, habits, properties and classification of animals.

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 endeavour to present all the important aspects of zoology in a well-balanced account.

Scientists, Agriculturists and Horticulturists will also find this book helpful and useful.