This book is a comprehensive study of the extinct dogs of North America. Cope, a renowned naturalist and paleontologist, provides a detailed account of the morphology, taxonomy, and evolution of these dogs, based on his extensive research and observation. The book includes numerous illustrations and photographs, as well as a chronology of the discovery of dog fossils in North America. This is a must-read not only for dog lovers but also for anyone interested in the natural history of North America.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.