. Biology of the vertebrates : a comparative study of man and his animal allies. Vertebrates; Vertebrates -- Anatomy; Anatomy, Comparative. The secondary tongue of most frogs and toads, which is attached far forward on the floor of the mouth cavity, is retroflexed when at rest, so that its point lies backward down the throat. When it is flipped out after an insect (Fig. 234) or a slug, it is "swallowed" upon its return, along with the captured food, and thus restored to its original position. One family of toads, including the genera Pipa and Xenopus, is named Aglossidae, because in
. Biology of the vertebrates : a comparative study of man and his animal allies. Vertebrates; Vertebrates -- Anatomy; Anatomy, Comparative. The secondary tongue of most frogs and toads, which is attached far forward on the floor of the mouth cavity, is retroflexed when at rest, so that its point lies backward down the throat. When it is flipped out after an insect (Fig. 234) or a slug, it is "swallowed" upon its return, along with the captured food, and thus restored to its original position. One family of toads, including the genera Pipa and Xenopus, is named Aglossidae, because in these exceptional animals, the tongue is either absent or very poorly developed. Reptiles embryonically possess a double tongue, like that evolved by am- phibians, although with considerable modification. In turtles and alligators it is thick and only slightly protrusible, whereas in snakes and lizards it may become extremely extensible. The little wall lizards, or "geckos," for example, can easily lick the outside of their transparent eyelids with their tongues, while snakes can protrude their delicate sensitive forked tongues for some distance through a median notch in the edge of the lower jaw, without opening the mouth. The chameleon (Fig. 41), an arboreal African lizard famous for its kaleidoscopic color changes, while grasping the twig of a tree uses its long tongue like a lasso in entangling its elusive prey, in much the same way as the salamander Eurycea from a position on the ground shoots out its. Fig. 234. a fly. Tongue of a toad catching. 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 Walter, Herbert Eugene, b. 1867; Sayles, Leonard Perkins, 1902-. New York : Macmillan Co.
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Keywords: ., bookcentury1900, booksubjectanatomycomparative, booksubjectverte
