Read Development of Amblystoma Punctatum, Vol. 1: External (Classic Reprint)

Development of Amblystoma Punctatum, Vol. 1: External (Classic Reprint)

Samuel Fessenden Clarke

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Description:Excerpt from Development of Amblystoma Punctatum, Vol. 1: External IN early March of 1878, I obtained in early stages of develop ment a number of eggs which I believed to be those of some Urodele. They were found in considerable numbers in the pools and small streams in and near the woods about Baltimore, dur ing the months of March and April. They occurred in gelatinous masses, Plate 4, Figure 30, which varied greatly in size, were usu ally more or less oval in shape, and attached to the stem of some aquatic plant or to an overhanging blade of grass. This year I was so fortunate as to secure living specimens of both sexes of Amblystoma punctatum before the females had de posited their eggs. They all did well in confinement; the males furnished an abundance of spermatozoa at the critical moments, the eggs passed through their various phases of development, and a record of the external change is preserved by a series of camera lucida drawings. The animals derived from the eggs brought to me in the Spring of 1878, were studied with considerable care and received considerable attention in respect to their food and sur rounding conditions. I was unable, however, to keep them after they reached the abranchiate stage, and in consequence could not determine what form I had been at work upon. I was much pleased then to find upon carefully comparing the eggs laid by the adults in my aquaria this spring, their course of development and their more advanced forms, that they agree in every particular with the eggs and young forms which had occupied my attention in the previous years. By getting the eggs in this way I was able also to obtain the changes during segmentation, which I had not gotten from my previous observations. 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.We have made it easy for you to find a PDF Ebooks without any digging. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Development of Amblystoma Punctatum, Vol. 1: External (Classic Reprint). To get started finding Development of Amblystoma Punctatum, Vol. 1: External (Classic Reprint), you are right to find our website which has a comprehensive collection of manuals listed.
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Description: Excerpt from Development of Amblystoma Punctatum, Vol. 1: External IN early March of 1878, I obtained in early stages of develop ment a number of eggs which I believed to be those of some Urodele. They were found in considerable numbers in the pools and small streams in and near the woods about Baltimore, dur ing the months of March and April. They occurred in gelatinous masses, Plate 4, Figure 30, which varied greatly in size, were usu ally more or less oval in shape, and attached to the stem of some aquatic plant or to an overhanging blade of grass. This year I was so fortunate as to secure living specimens of both sexes of Amblystoma punctatum before the females had de posited their eggs. They all did well in confinement; the males furnished an abundance of spermatozoa at the critical moments, the eggs passed through their various phases of development, and a record of the external change is preserved by a series of camera lucida drawings. The animals derived from the eggs brought to me in the Spring of 1878, were studied with considerable care and received considerable attention in respect to their food and sur rounding conditions. I was unable, however, to keep them after they reached the abranchiate stage, and in consequence could not determine what form I had been at work upon. I was much pleased then to find upon carefully comparing the eggs laid by the adults in my aquaria this spring, their course of development and their more advanced forms, that they agree in every particular with the eggs and young forms which had occupied my attention in the previous years. By getting the eggs in this way I was able also to obtain the changes during segmentation, which I had not gotten from my previous observations. 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.We have made it easy for you to find a PDF Ebooks without any digging. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Development of Amblystoma Punctatum, Vol. 1: External (Classic Reprint). To get started finding Development of Amblystoma Punctatum, Vol. 1: External (Classic Reprint), you are right to find our website which has a comprehensive collection of manuals listed.
Our library is the biggest of these that have literally hundreds of thousands of different products represented.

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Development of Amblystoma Punctatum, Vol. 1: External (Classic Reprint)

Development of Amblystoma Punctatum, Vol. 1: External (Classic Reprint)

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