This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1845 Excerpt: ...and Newts, a large warty protuberance behind the ear, from which an acrid milky fluid may be readily expressed, the excretory ducts of the several sacs being readily recognised during this operation. The transition from the Naked to the Squamigerous Reptiles appears to be effected by those kinds of Reptiles, as the ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1845 Excerpt: ...and Newts, a large warty protuberance behind the ear, from which an acrid milky fluid may be readily expressed, the excretory ducts of the several sacs being readily recognised during this operation. The transition from the Naked to the Squamigerous Reptiles appears to be effected by those kinds of Reptiles, as the Chameleon, that are provided with a thin and delicate epidermis, having beneath it soft tubercles or excrescences, endowed with the power to expand and contract. These tubercles, which are continued also upon the circular eyelids, are separated from each other by strong annular layers of fibres, and consist of a bed of fibro-cellular tissue, within which a double layer of pigmentary cells may be detected. The most superficial pigmentary cells are black, either small and rounded, or of larger size and ramified, and beneath them are found some smaller nucleated cells or spots of a bright red color. The general appearance of these structures remind us very strikingly of the chromatophorous cells of the Cephalopoda, and it is probable that in the living Chameleon the same lively contraction of the walls of the cells may take place as in the Cuttle-fish; and to this property may be owing the well-known power of changing color which that animal possesses. In specimens preserved in spirits of wine, these cells may be rendered beautifully distinct by treating the skin with caustic potash. The Squamigerous Reptiles exhibit various degrees in the development of their epidermic structures, giving rise to those numerous diversities of form which it is the special province of Zoology to depict. Frequently, as in the Snakes, in Scincus and other Saurians, scales are found that overlap each other like tiles, as in Fishes, or are disposed in a quincunctial order...
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Add this copy of Elements of the Comparative Anatomy of the Vertebrate to cart. $22.92, new condition, Sold by Paperbackshop rated 4.0 out of 5 stars, ships from Bensenville, IL, UNITED STATES, published 2019 by HardPress Publishing.
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Add this copy of Elements of the Comparative Anatomy of the Vertebrate to cart. $34.07, new condition, Sold by Booksplease rated 4.0 out of 5 stars, ships from Southport, MERSEYSIDE, UNITED KINGDOM, published 2018 by HardPress Ltd.
