. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 1148 TONGUE. mouth, it is seen to be a whitish, fleshy, ru- ratus and muscles, and from the description of the two deduce the most probable explanation of the movements. When a portion of the integument and lower jaw on one side is removed, so as to expose the tongue when retracted within the gous mass, about an inch and a half long, fill- ing the buccal cavity, so as to depress the floor of the mouth and throat, in shape some- thing of a cone with the base in front: the posterior half, or smaller part, is seen to be thr
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 1148 TONGUE. mouth, it is seen to be a whitish, fleshy, ru- ratus and muscles, and from the description of the two deduce the most probable explanation of the movements. When a portion of the integument and lower jaw on one side is removed, so as to expose the tongue when retracted within the gous mass, about an inch and a half long, fill- ing the buccal cavity, so as to depress the floor of the mouth and throat, in shape some- thing of a cone with the base in front: the posterior half, or smaller part, is seen to be thrown into deep and numerous transverse rugae (fig. 761. A, b, and C.) which extend Fig. Tongue of the Chameleon. A, retracted. B, elongated. C, seen from beneath, in situ, by incision and separation of the integument. quite up to the hyoid bone, and give to this part the appearance of an earth-worm, a simile suggested by Belorr. When the tongue is drawn out it is seen to be capable of great extension (B), the extension taking place in the posterior or rugose portion, and being effected by the obliteration of the transverse rugae, which one by one are smoothed or flattened out as the extension is continued, so that when it is stretched as far as it will go by moderate traction, the tongue, instead of being an inch and a half long, of which only half is occupied by the extensible portion, is five inches long, the extensible part occupying about six-sevenths of the entire extent, and being much attenuated (B, 6), while the an- terior portion retains its original size and shape (a). The tongue is thus seen to be composed of two parts, a club-shaped ex- tremity and a highly extensible medium of connection between this extremity and the hyoid bone : these two parts I shall now describe. The anterior club-shaped extremity is about three quarters of an inch long, and three lines in diameter, and in shape reminds one of the corolla of a labiate flower ; in fact it is bilabi- ate :
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