This classic zoology text provides a comprehensive overview of the animal kingdom, ranging from microscopic invertebrates to large mammals. Kingsley's comparative approach emphasizes the interrelationships between different species and the evolutionary processes that have shaped them. Richly illustrated with diagrams and photographs, this book is an excellent resource for biology students and anyone interested in the diversity of life on earth. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.