Catalogue of Reptiles. 75 



/. 2 specimens like c. 



only smaller. Andamans. Lt.-Col. Tytler. 



(j. small, adult. Nicobars. 



This is the type of T. Canton, Blyth. 



It is in a very bad state but would seem to be like b. in coloration: 

 throat is scarcely mottled greenish brown; belly unmottled. Scales 

 in 27 rows. 



It is no doubt also the T. puniceus, purpmeua and purpureo-maca- 

 latus (!) of Dr. Gray. 



i All the above species and varieties seem connected by certain per- 

 mt characters. Supranasals separated by an azygos shield. .Second 

 upper labial margining the praBorbital pit in front. Scales well keeled 

 mi 23 to 27 rows. Coloration in the genus is not of mnch value, as it is 

 a variable character, especially after lone immersion in spirits, yei it 

 seems to have been mnch relied on, to judge by the epithets fastened 

 on to the species by very eminent Naturalists* 



T. gramixeus, Shaw. 



a. many specimens. Sylhet, Birma, Malacca. 



_ On the authority of these assigned localities, I retain this as a dis- 

 tinct species, otherwise, were it confined to Bengal, I should hardly 

 venture to do so. The sweond labial touches the prajorbital pit in front, 

 One azygos shield (sometimes divided) separates the supranasals. Scales 

 ol the body not stronglv k< eled, in from 19 to 21 rows. Form slender 

 and tail tongish, compared with T. wrmatus, and scales much less keeled. 

 Were the species more local, the feeble carination of the scales and 

 slender form would only, I think, weigh sufficiently to constitute a 

 race, but as the distribution seems almost co-extensive with the stouter 

 J. ccmnatm, the above characters have greater weight and constitute a 

 specific distinction. I myself have never remarked it in Pegu, where 

 T. can mi /ns would seem to replace it to a great extent. 



T. TRIGONOCEPIIALUS, MeiT. 



a. fine adult. Colombo. Dr. Kelaart. 



T. erythrurus, Cantor. (?) 



Supranasals contiguous. Second upper labial forms front margin 

 of praaorbital pit. Scales keeled, in twenty-three rows. Supranasals 

 contiguous. 



a. small adult. No record. 



This seems to be uniform brownish green without markings. It 

 differs from the type in having 23 and not 21 rows of scales. It is 

 very possibly a variety of T. carmatus with the azygos shield on the 

 snout suppressed. Perhaps T. anamallensis, Gunth. 



T. Andersoni, Theobald. 



Second upper labial forms, the anterior margin of praBorbital pit: 

 supranasals separated by an azygos shield. Scales keeled, in 25 rows. 



Color above and below uniform rich brown. Belly and sides con- 

 spicuously white spotted. 



