. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 896 TEETH. rig. Teeth in different stages of formation from one alveolus of the Gavial: a is the base partly absorbed by the pressure of b, the successional tooth ; below which is figured c, the germ of the next tooth to follow. Amongst the remains of Crocodilians which are scattered through the Tilgate strata, the most common ones are detached teeth, from the difference observable in the form of which, Dr. Mantell has observed, that " they appear referable to two kinds, the one belonging to that division of c
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 896 TEETH. rig. Teeth in different stages of formation from one alveolus of the Gavial: a is the base partly absorbed by the pressure of b, the successional tooth ; below which is figured c, the germ of the next tooth to follow. Amongst the remains of Crocodilians which are scattered through the Tilgate strata, the most common ones are detached teeth, from the difference observable in the form of which, Dr. Mantell has observed, that " they appear referable to two kinds, the one belonging to that division of crocodiles with long slender muzzles, named Gavial, the other to a species of Crocodile, properly so-called, and resembling a fossil species found at ;* Dr. Mantell has obligingly communicated to me figures of well-preserved specimens of both the forms of teeth alluded to, the exact- ness of which I have recognised by a com- parison with the specimens themselves in the British Museum. The tooth which, from its more slender and acuminated form, approaches nearest to the character of those of the Gavial, presents a marked difference, however, from the teeth of any of the recent species of that sub-genus of Crocodilians, as well as from those of the long and slender-snouted extinct genera, called Teleosaurus, Sfeneosaurus, &c. I have described iff, therefore, as indicative of a distinct species, under the name of Crocodihts cultridens. The crown is laterally compressed, submcurved, with two opposite trenchant edges, one forming the concave, the other the convex, outline of the tooth. In the Gavial, the direction of the flattening of the crown and the situation of the trenchant edges are the reverse, the compression being from be- fore backwards, and the edges being lateral.^ * Wonders of Geology, 1839, vol. i. p. 386. t Odontography, pi. Ixii. A,jiys. 9, 10. J The tooth attributed by M. Deslongchamps to the Poikilopleurori) agrees in form with those of The tooth of t
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