. Elements of comparative zoology. Zoology. CRUSTACEA. 227 number thus taken upon the shores of New England and Canada amounts to between twenty and thirty million annually. Overfishing is, however, rapidly reducing the numbers caught. Cray- fish are used largely as food in Europe, and are bred in ponds for the mar- ket, but in America they i/ are largely neglected. Shrimps and prawns are mostly salt-water forms, but some of the prawns occur in fresh water in the warmer parts of the world. The line between the two is not ' easily drawn except by say- ing that the body of the shrimp (fig. 54) i
. Elements of comparative zoology. Zoology. CRUSTACEA. 227 number thus taken upon the shores of New England and Canada amounts to between twenty and thirty million annually. Overfishing is, however, rapidly reducing the numbers caught. Cray- fish are used largely as food in Europe, and are bred in ponds for the mar- ket, but in America they i/ are largely neglected. Shrimps and prawns are mostly salt-water forms, but some of the prawns occur in fresh water in the warmer parts of the world. The line between the two is not ' easily drawn except by say- ing that the body of the shrimp (fig. 54) is flat- tened (depressed) from above downwards, while that of the prawn is com- pressed (flattened from side to side). In America, FIG. 54.—Common shrimp (Lrangon ' Shrimp Salad ' is almost vulgaris). From Emerton. universally made from prawns. Of the Anomura, the most interesting are the so-called hermit-crabs (fig. 55). These are somewhat lobster-like, but the abdomen is but slightly hardened, and so, to protect this vulnerable part of the body, the crab inserts it in a deserted snail-shell, and this 'house' he carries about with him wherever he goes, retreating into it and closing the opening at the approach of danger with his. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kingsley, J. S. (John Sterling), 1854-1929. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1904
