On the Natural History and Classification of Fishes, Amphibians, and Reptiles, Volum 1Longman, Orme, Brown, Green, & Longmans, and J. Taylor, 1838 |
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On the Natural History and Classification of Fishes, Amphibians and ..., Volum 1 William Swainson Visualització completa - 1838 |
On the Natural History and Classification of Fishes, Amphibians ..., Volum 1 William Swainson Visualització completa - 1838 |
On the Natural History and Classification of Fishes, Amphibians ..., Volum 1 William Swainson Visualització de fragments - 1838 |
Frases i termes més freqüents
aberrant Acanthopteryges adipose adipose fin affinity Amphibia anal fin analogies anguilliform animals apodal appear arrangement Artedi belly birds Bloch body bones bony branchial apertures cartilaginous fishes cartilaginous order caudal fin characters cheloniform fishes Chimæra circle cirri Clupea Cuvier Ditto dorsal fin eels Esox eyes flat fish fleshy Gadida Gadus genera genus gills head ichthyologist India instance Lacepede latter Laurida length lengthened Linn Linnæus Loricaria Malacopteryges membrane mouth muzzle natural naturalist nearly observed order of fishes osseous fishes pectoral fins peculiar pikes placed plates Plectognathes possess present primary divisions Pristogaster quadrupeds Rafinesque rays remarkable represent reptiles resemblance rounded salmon Salmonida scales seen serrated sharks silures Silurida Silurus singular skin slender snout species spines spiracles Spix Squalus Squatina structure sub-family sub-genera sub-genus tail teeth Thryssa true ventral fins Vertebrata vertical Warm seas whole Yarrell
Passatges populars
Pàgina 52 - The impregnated ova of the fish of one rainy season are left unhatched in the mud through the dry season, and from their low state of organization as ova, the vitality is preserved till the occurrence and contact of the rain and the oxygen of the next wet season, when vivification takes place from their joint influence.
Pàgina 315 - ... rendered them conspicuous objects to all their enemies. When near the ground, they swim slowly, maintaining their horizontal position ; and the smaller pectoral and ventral fins on the under side are advantageous where there is so much less room for their action, than with the larger fins that are above. When suddenly disturbed, they sometimes make a rapid shoot, changing their position from horizontal to vertical : if the observer happens to be opposite the white side, they may be seen to pass...
Pàgina 182 - These nerves, having entered the organs, ramify in every direction, between the columns, and send in small branches, on each partition, where they are lost. The magnitude and the number of the nerves bestowed on these organs, in proportion to their size, must on reflection appear as extraordinary as the phenomena they afford. Nerves are given to parts either for sensation or action.
Pàgina 65 - ... reader will excuse me; it has originated in my desire to do adequate, though tardy, justice to one whose whole life has been devoted to science, and who has been singularly unfortunate in his worldly concerns; who, notwithstanding his eccentricities, has a kind and benevolent heart; and whose labors have never been appreciated as I think they deserve.
Pàgina 302 - swims near the surface at all distances from land, and is seen not unfreqnently to spring out of its element ; its vivacity being such that it will for a long time play about a floating- straw, and leap over it many times in succession. When it has taken the hook it mounts to the surface, often before the fisherman has felt the bite : and then with its slender body half out of the water, it struggles with the most violent contortions to wrench the hook from its jaws. It emits a strong smell when...
Pàgina 182 - Nerves are given to parts either for sensation or action. Now if we except the more important senses of seeing, hearing, smelling, and tasting, which do not belong to the electric organs, there is no part, even of the most perfect animal, which, in proportion to its size, is so liberally supplied with nerves; nor do the nerves seem necessary for any sensation which can be supposed to belong to the electric organs. And, with respect to action, there is no part of any animal with which...