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Search - Illustrations Of Comparative Anatomy, Vertebrate And Invertebrate, For The Use Of Students In The Museum Of Zoology And Comparative Anatomy

Illustrations Of Comparative Anatomy Vertebrate And Invertebrate For The Use Of Students In The Museum Of Zoology And Comparative Anatomy
Author: Various

Illustrations of comparative anatomy, vertebrate and invertebrate, for the use of students in the Museum of Zoology and Comparative Anatomy - 1875. - PREFACE - THE specimens and dissections described in the following pages have been prepared to illustrate the most important forms in Invertebrate and Vertebrate Anatomy. When the first edition of ... more »these descriptions, entitled List of Dissections, was published in 1871, Invertebrate Anatomy alone was illustrated. We have now included four representative Vertebrate forms-Rat, Pigeon, Frog, and Perch and have increased the series of Invertebrata from 55 to 90 adding to it several specimens, with detailed descriptions, of the Exoskeleton in those forms where such descriptions are not to be met with in the text-books that are commonly used by English students. All the descriptions have been carefully revised. As in the former edition, we have not attempted to give a complete account of each dissection, but merely an indication of its leading features, to enable students more readily to recognise the points dwelt upon in the literature of the subject, or in lectures and to shem them clearly the position and relation of the organs which they will subsequently have to examine when they begin to dissect. For this reason the very language used by Prof. olleston, Prof. Huxley, and others has been . reproduced where it has been ossibleto do so. Our obligations to Prof. Rolleston are however far greater than mere passages of description, for it is to his work that our own owes its existence. For the sake of brevity we have cited as Rolleston, Forms of Animal Life, by G. ROLLESTO M N, . D., Oxford, 1870. J. W. CLARK, Szq erintendant. T. W. BRIDGE, Demonstrator of Comparative. Anatomy. ILLUSTRATIONS OF COMPARATIVE ANATOMY, ERTEBRATE AND INVERTEBRATE. SUB-KINGDOM PROTOZOA. 1. A piece of the common Freshwater Sponge XporyilZa fEuviatiZis, exhibiting its siliceous skeleton. Rolleston, p. 163. SUB-KINGDOM COILENTERATA. CLASS HYDROZOA. 2. A Sea-Fir Sertzclaria abietina. It consists of a slender pinnately-branched ccenosarc invested by a chitinous periderm. B0t. h the main stem and the lateral pinnze are beset by numerous sessile or sub-sessile more or less flask-shaped chitinous hydrothecze, in which the polypites are lodged. In addition to these, larger but similarly shaped vesicles are to be observed studding the pinnae. These are the gonothecae and contain the generative zooids. The animal when mature is non-locomotive and is attached to its base by a hydrorhiza. 3. A Sea-Anemone Tealia crassicornis, from which the base has been removed. The tentacles and the space round the mouth- peristomial disc -are too much retracted to be well seen. On the other side of the preparation the internal surface of the digestive cavity is exposed, marked with fine radiating lines, which correspond with the attachments to it of the vertical muscular lamellar plates termed mesenteries. These radiate from the outer surface of the stomach to the inner wall of the outer integument, and thus divide the space between the two-the body cavity-into a number of wedge-shaped compartments. Some of these mesenteries fail by greater or less intervals to reach the outer surface of the stomach, and are therefore called secondary or tertiary mesenteries, while those that are attached to that organ and to the outer in tegument are called primary. Between them are seen some of the generative glands. The cord-like craspeda are also to be seen, attached to the inner edges of the mesenteries, Rolleston, p. 158. . SUB-KINGDOM ECHINODERMATA. 4...

ISBN-13: 9781408613863
ISBN-10: 1408613867
Publication Date: 1/31/2008
Pages: 72
Rating:

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Publisher: Read Books
Book Type: Paperback
Members Wishing: 1
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