Ecological animal geography; an authorized, Ecological animal geography; an authorized, rewritten edition based on Tiergeographie auf ockologischer grundlage ecologicalanimal00hess Year: 1937 Fig. 25.—Haploops tubicola. Enlarged five times. After Delia Valle. Some fishes also hide themselves by burying wholly or partly in the sand, and thus lie in wait for their prey. All these have a flattened, light-colored ventral side, eyes usually directed upward, and the mouth also often turned up. While in free-swimming carnivorous fishes the Fig. 26.—Amphioxus, Branchiostoma lanceolatum, burrowed in
Ecological animal geography; an authorized, Ecological animal geography; an authorized, rewritten edition based on Tiergeographie auf ockologischer grundlage ecologicalanimal00hess Year: 1937 Fig. 25.—Haploops tubicola. Enlarged five times. After Delia Valle. Some fishes also hide themselves by burying wholly or partly in the sand, and thus lie in wait for their prey. All these have a flattened, light-colored ventral side, eyes usually directed upward, and the mouth also often turned up. While in free-swimming carnivorous fishes the Fig. 26.—Amphioxus, Branchiostoma lanceolatum, burrowed into the sand. Slightly enlarged. Fig. 27.—Natica josephina attacking a bi- valve in sand, holding its prey with the di- visions of its foot while boring through the shell. After Schiemenz. Fig. 27 eyes are only slightly movable, with their fields of vision overlapping only a little (10-30°), the eyes of the flatfishes and of other bottom dwellers are very mobile and their fields of view overlap to the extent of 35-80°, according to the species. This binocular vision probably
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