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Show 1869.] DR. J. E. GRAY ON THE TORTOISES. 185 10. CALLICHELYS, Gray, Ann. and Mag. N. H. xii. 1863, p. 176. 11. D E I R O C H E L Y S , Agassiz. I have not been able to examine the alveolar edge of the last three genera; they may belong to the next tribe. Section II. HYDROCLEMMYS. The alveolar surface of the upper and lower jaws broad, expanded, covering more or less of the sides of the front of the palate, so that the internal nostrils open near the middle of the palate. Lower jaw strong. Toes webbed. Tribe IV. MALACLEMMYDINA. The alveolar surface smooth. Toes strong, spreading, covered with a soft skin. Eyes subsuperior; pupils annular, without any lateral spot. i. The upper or alveolar surface of the under jaw broad, concave, rather narrower on the hinder part of the side. Internal nostrils subposterior, behind the middle of the alveolar surface. * Front of the palate, before the internal nostrils, with a broad central groove. Eyes subsuperior (Estuarian). 12. MALACLEMMYS, Gray, Cat. Shield Rept. p. 37. ** Front of the palate, before the interior nostrils, simple. Eyes lateral. 13. DAMONIA. II. The upper or alveolar surface of the under jaw wide, angular, concave in front, narrow and sharp-edged on the sides behind. Internal nostrils subanterior. 14. GLYPTEMYS. III. The upper or alveolar surface of the lower jaw narrow, sharp-edged in front, wider and flattened on the hinder part of the sides. Internal nostrils subanterior. 15. BELLIA. Skin of neck and limbs with very minute granular scales. Tribe V. BATAGURINA. Head large, nose rather produced ; angles of the mouth covered with minute scales. The alveolar surface of the jaws very broad, with one or two strong ridges or grooves. Internal nostrils subposterior. Toes elongate, weak, expanded, covered with small scales, united by broad webs to the claws ; hind feet fringed. The cavity of the thorax much contracted on each side at each end by broad, erect, internal, bony lateral plates. Asia. |