TROPIDOPHORUS COCHINCHINENSIS. 77 



central shield between ; four supraorbitals. The nostril is in a small single lateral shield 

 between the first labial and prsefrontal ; there are two other shields between the nasal and 

 the orbit. Five upper and as many lower labials. A single chin-shield in front, behind 

 the median lower labial ; three other pairs of chin-shields behind the single one, the shields 

 of the last pair being separated by scales. Temple covered by small keeled scales. The 

 dorsal scales are aiTanged in seven or eight longitudinal series ; the lateral scales are smaller, 

 disposed in series descending obliquely backwards; there are about ten scales in each 

 oblique series ; the scales of the belly are nearly smooth, in eight longitudinal series. Prse- 

 anal scales three, nearly equal in size. Back of the tail with two series of spinous keels 

 which are moderately elevated, and not corresponding to two similar series on the trunk ; 

 they are confluent at the root of the tail, and pass into the series of scales in the middle of 

 the back ; there are five serrated keels on each side of the tail ; subcaudals in a single series, 

 larger and broader than the ventral scales. 



The lower eyelid is scaly ; tympanum as large as the orbit. 



Brownish grey, slightly marbled with darker ; toes and lower part of the tail dotted with 

 brown. 



We have seen only one specimen of this species, from Chartaboum, on the coast of Siam. 

 It is 5^ inches long, the tail measuring 3^ ; and is figured on Plate X., of the natural size, 

 figures a, a', a" representing the head and anal region. 



Tropidophoeus cochinchinensis. 



Leposoma cochinchinensis, Cuv. Regne Anim. 



Tropidophorus cocincinensis, Dum. ^ Bibr. v. p. 556. pi. 57. f. 1. Giinth. I. c, 



Tropidosaurus montanus. Gray, in Griff. An. Kingd, ix. p. 35. 



This species is closely allied to T. microlejns, but its snout is rather more obtuse. Scales 

 on the back strongly keeled, the keels terminating in slightly elevated spines. Two series 

 of moderately elevated spines along the middle of the back of the tail, the series being 

 continuous with two series of the back of the trunk. Prseanal shields two, large. Two 

 prsefrontals. 



Cochinchina. 



Aspris berdmorei (Blyth, Journ. As. Soc. Beng. xxii. p. 650), from Mergui, is probably 

 another species of this genus, but the description given does not contain any definite 

 characters ; it would appear to agree with T. cochinchinensis in having only two praeanals, 

 and with T. microlepis in having a compressed and subacute snout. 



