Elements of Herpetology, and of Ichthyology: Prepared for the Use of Schools and Colleges

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Grigg & Elliot, 1846 - Fishes - 145 pages
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Page 64 - Have the posterior part of the body and tail, very much compressed, and greatly raised in the vertical direction, which giving them the facility of swimming, constitutes them aquatic animals.
Page 58 - • nostrils. of the most violent of poisons. It is neither acrid nor burning ; it only produces on the tongue a sensation analogous to that occasioned by a fatty matter, and may be swallowed with impunity ; but, introduced in sufficient quantity into a wound, it produces death with frightful rapidity. Its power varies with the species, and according to the circumstances in which the Serpent is found. The same species appears to be more dangerous in warm, than in cold or temperate countries ; and...
Page 110 - The sound or swimmmgbladder of codfish, if rightly prepared, supplies an isinglass equal to the best Russian, and applicable to all the uses for which the imported is employed. The liver of the cod, when fresh, is eaten by many with satisfaction, but it is more generally reserved, by fishermen, for the sake of the large quantity of fine limpid oil which it contains. This is extracted by heat and pressure...
Page 69 - ... the eyes are distinguishable through the skin, and a transverse slit is seen under the neck, so as to form there a kind of membranous operculum, analogous to the gill-covers of Fishes. By degrees, the gills (Fig. 316) ramify ; and the lips are covered with a kind of horny beak ; by the aid of which the animal fixes itself to the vegetables, on which it is chiefly nourished. This state, however, only endures for a short time. At the end of some days, the gill-fringes, which float on each side...
Page 130 - The vessels that convey the blood from the heart to all parts of the body are called arteries; the vessels which return the blood to the heart are called veins.
Page 87 - ... less length. At the time for spawning, they generally approach the coasts or enter the rivers; and in this manner they sometimes effect an extremely long passage. Every year, towards the same period, large numbers of migrating fish arrive in the same places; and it is generally believed that several of these species regularly migrate from the north towards the south, and from the south towards the north, following a determined route ; but perhaps it would be more true to believe, that when they...
Page 92 - ... the middle plate is serrated ; the last portion of the third plate the gill cover, constituted of three pieces, has two nearly concealed spines. In the...
Page 64 - Egyptians made it the emblem of the protecting divinity of the world, and sculptured it on the sides of a globe upon the gates of their temples. By pressing this snake on the nape, the jugglers of Egypt throw it into a stiff and immovable condition, which they call turning it into a rod. It is probably the Asp of Egypt, and Asp of Cleopatra.
Page 130 - ... their gills, which form a series of pectiniform vascular fringes supported upon a system of bones called the Branchial arches. The branchial arches, which are generally four in number on each side, are attached by one extremity to an intermediate chain of bones (53, 54, 55), situated in the mesial line behind the os hyoides, whilst by their opposite extremity they are connected by ligaments to the under surface of the cranium.
Page 117 - Jaws divided in the middle, so as to present the appearance of four teeth, two above and two below : skin rough, with small slightly projecting spines : body capable of inflation.

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