794 REPTILIA. 



The upper surface of the limbs and tail greenish-olive. The under surface of the 

 head, neck, limbs, and tail white, suffused mth bluish. In the young, there is a yellow 

 spot behind the angle of the mouth, with a dark area behind it prolonged over 

 the tympanum, and along the under surface of the throat, from side to side, 

 with dark margins. A broad u-regular yellow spot behiud this, running up on 

 to the surface of the head, behind the tympanum, and across the under surface of 

 the neck. The rest of the under surface of the neck purplish, also the under sur- 

 face of the plastron, as in young Asiatic Trionyces generally.^ The upper surface 

 of the carapace is dark olive-grey, densely punctulated with small black spots, the 

 two sides of the carapace anteriorly and posteriorly being occupied by a large 

 obscure dark round area, densely punctulated in its centre with deep black. These 

 black areas are the last traces of the brilliant dorsal ocelU of the yoimg. Under 

 surface of plastron pale fleshy yellowish, marked with the courses of numerous blood- 

 vessels, and the callous areas pinkish. 



In the young, the upper surface of the carapace is dark olive- grey, with two 

 pairs of ocelli. The centre of each ocellus is a round black spot, with a pale reddish 

 margia encu"cled by a broad dark area, nearly black. These ocelli are encircled 

 again by a broad dark line, portion of a broad reticulation of the shell, with similar 

 lines most crowded near the margin, where there is still a much finer black reticula- 

 tion, as on the head. The margin of the young shell is yellow, and its Tinder sur- 

 face blackish, internal to the yellow margin, especially on the hinder half of the 

 posterior surface, and over the bones more or less. The plastron itself being 

 yellowish, suffused here and there with dusky. The upper surface of the limbs is 

 dark olive, spotted with yellow. 



In the young specimen figured, the yellow spots on the cheek have almost 

 disappeared. 



The skull (figs. 29-31, p. 790-91) has the facial portion moderately pointed in the 

 adult, but in the young it is proportionally somewhat shorter. The alveolar ledge 

 of each side is separated from the j)osterior nares to the jiremaxillary foramen by a 

 moderately deep and broad groove. The pteiygoid region is broad, concave from side 

 to side, with the lateral margins somewhat convex. The posterior nares are 

 moderately long, with a ridge running backwards and inwards from the palatine to 

 the postpalatine foramen. The facial portion of the skull is directed considerably 

 forwards and dovmwards, and the external nasal opening is quadrangular. The 

 symphysis of the lower jaw is antero-posteriorly elongated, somewhat spat\ilate with 

 a prominent longitudinal ridge, 



I have obtained specimens of this species from Moulmein through the assistance 

 of Colonel Sladen, and from Myanyoung and other parts of the Irawady through 

 the invaluable aid accorded to the Indian Museum by Sir Ashley Eden, during the 

 period he was Chief Commissioner of British Burma. I have also received it from 

 Bhamo. The type of the species, as already stated, was from Tonghoo, on the 

 Sittang, where it was obtained by Mr. Theobald. 



• This is the stage apparently corresponding to T.formosus and probably to T. grayi. 



