This meticulously accurate nontechnical guide offers the amateur (or experienced) life science students all the information needed to know about frog. Ecology, Anatomy, Physiology, life history, metamorphosis, plus precise topics on osteology and embryology are given with illustrations. Considerable space has been devoted to describing the dissection techniques of the frog with illustrations. In writing this book, we kept in mind the need of students, a certain amount of physiology of a more or less general nature has accordingly been introduced in addition to the descriptions of the special functions of the various organs of the frog body. The book is more suitable for use as a text in college or university classes than in high schools, although it is hoped that it will prove of service to teachers in high schools and colleges where the frog is studied in the course in zoology. The endeavor has been made throughout the work to correlate the study of structure with that of the anatomy and physiological functions of the body and various activities of the organism as a whole in relation to the environment.