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The Structure Of The Ocelli Of Polyorchis Penicillata, Volume 11, presents a detailed scientific study of the ocelli (simple eyes) found in the marine hydrozoan Polyorchis penicillata. Authored by Etta Viola Little, this volume offers an in-depth exploration of the anatomical structures and physiological characteristics of these light-sensitive organs. This work is essential for researchers and students in marine biology, zoology, and comparative anatomy, providing valuable insights into the sensory mechanisms of marine invertebrates. The meticulous observations and detailed descriptions make this a significant contribution to the field, enhancing our understanding of the visual systems in simpler organisms and their adaptation to aquatic environments.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.