Published in 1920, this monograph is an essential reference for any researcher or enthusiast interested in the East American Scaphopod Mollusks. John B. Henderson provides a detailed description of the anatomy, distribution, and ecology of each species, as well as illustrations and maps to aid in identification. This book is an invaluable resource for anyone studying the marine biology of the Atlantic coast. 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.