( 222 ) 



Stoliczka (in J. A. S., 1870, p. 218) remarks on the difficulty 

 of separating specimens of this species where the scales are as few 

 as 21 rows from gramineus, the stouter form of the head beino- 

 the best criterion. In the Andaman Islands this species would 

 seem to be replaced by the next. 



T. porphyraceus, Blyth. J. A. S., 1860, p. 111. 



T. carinatus, Gray, apud Giinther. J. R., p. S8G. 



T. carinatus, Gray. b. and c. of my Cat. of Rept. A. S. B. 



Scales in 25 rows. Supranasals small, separated by a laro-ish 

 shield. Colour dull "grass green, with a fine pori^hyraceous 

 lustre throughout " (StoL), or " grass green, brown or blackish 

 either uniformly coloured, or variously mottled " Blyth). A few 

 indistinct large porphyraceous spots posteriorly. Upper lip and 

 below whitish. A lateral side streak rarely present. 



Grows to 48 inches. 



Inhabits the Andaman and Nikobar Islands. 



This species was separated from graifnineus {viridis) by Blyth 

 on account of its peculiar colouration, and Stoliczka describes it 

 as much narrower and more slender. It also has relations with 

 carinatus, but the head is less high than in that species, it would 

 appear also to be more restricted in its area than either of those 

 species. 



T. Cantori, Blyth. J. A. S., B., 1846, XV, p. 377. 



Scales in 27 — 29 rows. Scales on the head very small. Ven- 

 trals 174—184. Caudals 55 — 76. Anal entire, semilunar. 

 Colour duU green, with several rows of dark alternating spots. 

 A white streak from the rostral to the gape, margined above and 

 below with dark green, sometimes absent. A narrow white 

 lateral line along the body and tail. Below whitish or greenish, 

 with the base of the ventrals dark ashy. Tail strongly prehen- 

 sile, light grey, dark spotted. 



Grows to 48-50 inches. (Tail 675.) 

 Inhabits the Andaman and Nikobar Islands. 



