Elements of comparative zoology (1904) Elements of comparative zoology elementsofcompar1904king Year: 1904 328 SYSTEMATIC ZOOLOGY. * large species occur, some weighing 100 pounds or more. Many more species occur in the tropics of Africa and America, and some of these have the scales greatly devel- oped so that they form a bony armor. One African species, like the electrical eel and the torpedo, can give a sharp electrical shock. The carp and minnows abound in fresh water, but, excepting as they furnish food for other fishes, they are of little importance; the carp of Europe having a slight va
Elements of comparative zoology (1904) Elements of comparative zoology elementsofcompar1904king Year: 1904 328 SYSTEMATIC ZOOLOGY. * large species occur, some weighing 100 pounds or more. Many more species occur in the tropics of Africa and America, and some of these have the scales greatly devel- oped so that they form a bony armor. One African species, like the electrical eel and the torpedo, can give a sharp electrical shock. The carp and minnows abound in fresh water, but, excepting as they furnish food for other fishes, they are of little importance; the carp of Europe having a slight value as food for man. The goldfishes of Chinese origin also belong here. Much more valuable is the group of trout and salmon, which are among the most important of food-fishes. As a rule these have a soft fin behind the rayed dorsal. The salmon, of which there are one species on the Atlantic FIG. 127.—Atlantic salmon (Salmo solar}. After Goode. (fig. 127) and four on the Pacific coast, live in the sea and enter the rivers to lay their eggs. The whitefish of the lakes are closely allied forms. The blindfish of Mammoth Cave should be mentioned here. In this form a life in total darkness has resulted in the degeneration of the eyes, which are buried beneath the skin. The savage, swift-swimming pike, pickerel, and muska- longe, the latter reaching a length of eight feet, are, with one exception, confined to America. They are noted for
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