"Development of the Nine-banded Armadillo From the Primitive Streak Stage to Birth" offers a detailed examination of the embryological development of the nine-banded armadillo, with particular attention to the phenomenon of specific polyembryony. Authored by John Thomas Patterson and Horatio Hackett Newman, this work delves into the intricate processes from the primitive streak stage through to birth, providing valuable insights into the developmental biology of this unique mammal. This study is an essential resource for researchers and students in zoology, developmental biology, and related fields, providing a comprehensive look at the armadillo's embryological journey and contributing to a deeper understanding of vertebrate development and polyembryony. 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 was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. 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. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. 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.