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Author : John Sterling Kingsley
Publisher : Unknown
Page : 138 pages
File Size : 53,8 Mb
Release : 1892
Category : Electronic
ISBN : HARVARD:32044107213142
Author : Alpheus Spring Packard
Publisher : Unknown
Page : 74 pages
File Size : 44,7 Mb
Release : 1880
Category : Limulus
ISBN : UOM:39015061411057
Author : J. S. Kingsley
Publisher : Unknown
Page : 0 pages
File Size : 48,9 Mb
Release : 1892
Category : Limulus
ISBN : OCLC:610934332
Author : William Patten
Publisher : Legare Street Press
Page : 0 pages
File Size : 42,5 Mb
Release : 2023-07-18
Category : History
ISBN : 1020473258
This groundbreaking study from zoologist William Patten offers a detailed look at the embryonic development of the horseshoe crab Limulus polyphemus. Through careful observation and analysis, Patten identifies subtle variations in the developmental process that shed light on the evolutionary history of this ancient species. A must-read for anyone interested in the science of embryology or the natural world. 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.
Author : Anonim
Publisher : Unknown
Page : 128 pages
File Size : 54,9 Mb
Release : 1892
Category : Electronic
ISBN : OCLC:1111275208
Author : John Sterling Kingsley
Publisher : Theclassics.Us
Page : 38 pages
File Size : 48,8 Mb
Release : 2013-09
Category : Crabs
ISBN : 1230275029
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1892 edition. Excerpt: ... Stage K, Figs. 34 and 35 (Packard, Fig. 25; Self, Figs. 16 and 17) is the last stage previous to the molt which results in the adult form. The abdomen is relatively much larger than before; the opercular lobes have nearly met in the median line, and the animal begins to burrow in the sand, although embryos of this stage are not infrequently taken in the towing net. Stage L (Packard, Fig. 27) is produced from the last by a single molt. It is characterized by the presence of an elongate telson much like that of the adult. With this stage my studies end. The following points may also be of interest. The Blastodermhaut is molted at about Stage F, the time varying with different eggs. It still persists as an embryonic envelope (vicarious chorion of Packard) until a late stage. Soon after it is shed from the parent cells a second embryonic cuticle is cast, and then the true chorion is shed, and the embryo, encased in the distended Blastodermhaut, escapes from the egg at about Stage K or L. The Blastodermhaut itself is ruptured, and the animal begins its free existence at the end of Stage I, Comparisons. A. With Previous Accounts.--H. L. Osborn ('85) and Brooks and Bruce ('85) have described some of the phases of segmentation, the latter studying sections. Their account so far as it goes is reconcilable with what I have described, including the pre-segmental movements. They have also noticed the primitive cumulus and interpret it as giving rise to the mesoderm, a point to be discussed later. Neither, however, traces the relationship of the cumulus to the embryo. According to the last quoted paper the blastoderm is to be regarded as ecto-mesoderm, the yolk as at least largely, if not wholly, entoderm. Packard ('72) has apparently seen some of...
Author : William Patten
Publisher : Unknown
Page : 170 pages
File Size : 54,7 Mb
Release : 1896
Category : Limulus polyphemus
ISBN : HARVARD:32044107167520
Author : A. S. 1839-1905 Packard
Publisher : Sagwan Press
Page : 78 pages
File Size : 46,8 Mb
Release : 2015-08-23
Category : Electronic
ISBN : 1340085399
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.
Author : A. S. (Alpheus Spring) 1839-19 Packard
Publisher : Wentworth Press
Page : 84 pages
File Size : 50,7 Mb
Release : 2016-08-24
Category : History
ISBN : 1360267409
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.
Author : John Sterling Kingsley
Publisher : Palala Press
Page : 128 pages
File Size : 51,5 Mb
Release : 2016-05-21
Category : Electronic
ISBN : 1358388369
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.
Author : A. S. Packard Jr.
Publisher : Forgotten Books
Page : 48 pages
File Size : 50,8 Mb
Release : 2018-02-07
Category : Science
ISBN : 065603632X
Excerpt from The Anatomy, Histology, and Embryology of Limulus Polyphemus Most if not all the other leading zoologists, while recognizing the aberrant characters of the Limuli, have left them among the Crustacea, though in 1834 H. Milne-edwards established a subclass _(xiphosura) for the group; this group being equivalent to any one of several other subclasses of Crustacea which he enumerates. For the views we held previous to the publication of H. Milne Edwards' memoir, we would refer the reader to our Memoir on the development of Limulus, published in March, 1872. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author : Raymond Pearl
Publisher : Unknown
Page : 36 pages
File Size : 53,9 Mb
Release : 1904
Category : Electronic
ISBN : HARVARD:32044107167504
Author : Alpheus S. Packard
Publisher : Unknown
Page : 45 pages
File Size : 42,7 Mb
Release : 1880
Category : Limulus
ISBN : OCLC:1039528595
Author : A. S. 1839-1905 Packard,National Academy of Sciences (U S )
Publisher : Palala Press
Page : 122 pages
File Size : 51,8 Mb
Release : 2015-09-07
Category : Electronic
ISBN : 1341894819
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.
Author : Alpheus Spring Packard
Publisher : Unknown
Page : 43 pages
File Size : 52,7 Mb
Release : 1887*
Category : Arthropoda
ISBN : OCLC:79570583