51. PSEUDEMYS 



Description. — Shell rather narrow, depressed but not 

 very low, without definite dorsal keel. Vertebrals five, 

 broader than long. Costals four, first longest, second high- 

 est, last smallest. Nuchal well developed, not very narrow. 

 Marginals 12 on each side, supracaudals distinct. Plastron 

 large, somewhat shorter than carapace, truncate anteriorly, 

 weakly notched posteriorly. Gular plates smallest, triangu- 

 lar. Abdominals largest, with longest median suture. Axil- 

 lary and inguinal plates well developed. Head moderately 

 large, covered above and laterally with smooth skin. Upper 

 jaw not hooked. Skin of neck granular and folded. Limbs 

 covered with scales j anterior with five, posterior with four 

 digits webbed to bases of long claws. Tail moderate. 



The neck is clove brown with several pale longitudinal 

 lines on each side. The highest one of these ends on the 

 temple in a large oval spot of the same color. The lowest 

 and largest is continued forward across the middle of the 

 lower eyelid, giving off, at the lower edge of the inferior 

 maxillary bone, a branch which, continuing forward, crosses 

 to the upper jaw, runs past the anterior edge of the orbit, 

 turns forward at a right angle, and terminates at the nostril. 

 The five similar lines on the nape are continued forward over 

 the top of the head, and, besides being more or less undulat- 

 ing, give rise to several short transverse branches. There 

 are six longitudinal yellow rays on the forearm; one on each 

 edge and two on each surface. Greenish yellow lines tra- 

 verse the backs of the five fingers and four perfect toes. The 

 vertebrals sometimes show black spots. All the marginals 

 are ornamented with black ocelli. The plastron is marked 

 with large longitudinal seal brown blotches, not at all like 

 the double lines on this region in C. ornata. 



Length of carapace 



Greatest width of carapace 



