. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. ALIMENTARY CANAL OF REPTILES. 435 lining membrane retains the ciliated epithelium in most Batrachia. In fig. 294, E shows the roof of the mouth of a Newt, of the natin-al size and magnified: A shows the floor of the mouth with the oesophagus, d, laid open from above, the stomach, e, and lungs, f,f. a is the lower jaw, h the tongue, c the glottis. The currents jiroduccd by the vibratile cilia are made visible by powdered charcoal, and their course is indicated by the arrows, beginning at the symphysis and extending to the
. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. ALIMENTARY CANAL OF REPTILES. 435 lining membrane retains the ciliated epithelium in most Batrachia. In fig. 294, E shows the roof of the mouth of a Newt, of the natin-al size and magnified: A shows the floor of the mouth with the oesophagus, d, laid open from above, the stomach, e, and lungs, f,f. a is the lower jaw, h the tongue, c the glottis. The currents jiroduccd by the vibratile cilia are made visible by powdered charcoal, and their course is indicated by the arrows, beginning at the symphysis and extending to the cardiac end of the cesophagus. The ciliary movement ' is remarkably vivid in the mouth of the Serpent; and in the Tortoise it endures for several days after death, not ceasing till the parts arc destroyed by putrefaction.'' Fig. 295 gives a magnified view of some of the ordinary nucleated epithelial scales, a, b, c, and of some ciliated scales, c/, e, f, g, from the mouth of the Frog. The tongue, as an organ of taste in 295 Reptiles, has been noticed, p. 327. In _ ^ Newts it is usually small, as at h, fig. 294. In most tailless Batrachians it is large: attached to the floor of the month, a little behind the symphysis of the mandible, with its free border directed. Kucleatefl nnrl ciliated epithelial scales mouth of Frog backward.^ This part can Idc raised and thrown out of the mouth hy a rotatory movement, as on a hinge, with a certain elongation, equaling in some Toads two thirds or more of the length of the body. A glutinous saliva is spread over the surface: both the pro- trusile and retractile movements are executed with extreme velocity, and thus the insect is seized and swallowed more quickly than the eye can follow, when the Batrachian has brought its mouth within the distance at which the tongue can reach the fly. The hyoid being raised and the mandible depressed, the genio- o-lossi, having their fixed point at the symphysis, raise and jerk forward the free part of the
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Keywords: ., bookauthorowenrichard18041892, bookcentury1800, bookdecade1860
