222 Indian and Malayan Amphibia mid Beptilia. [No. 3, 



sides of head blackish, hinder upper labials pale ; below greenish 

 sprinkled with reddish and dark brown. From Camorta, one of the 

 Nicobar islands, I obtained about 12 specimens. The measurements 

 of the four principal varieties are as follows : — 

 a. Total length 18f inch. ; tail 2f inch. ; ventrals 167 ; subcad. 50, 

 belly conspicuously yellowish, nearly uniform greenish brown above, 

 ^.tot. length 16 inch. ; tail 2| inch ; vent. 156; subc. 48; uniform. 



c. „ „ 18& „ „ 2J „ „ 160; „ 50; „ 



d. „ „ 18f „ „ 3£ „ „ 164; „ 62 ; banded. 



80. Trimeresurus Cantoris, B 1 y t h, PI. XII, Figs. 3-4. 



Trigonocephaly Cantori, B 1 y t b, Journal Asiatic Society, Bengal, 1816, 

 XV, p. 377. 



Trimeresurus viridis, var. Cantori, B 1 y t b, ibid. 1860, vol. XIX, p. 110. 



Body moderately slender, with a large triangular, rather high 

 head, (being about one-twentieth of the total length), and a pro- 

 portionately short tail, varrying in length from one-seventh to one- 

 ninth of the total length of the body. 



Scales narrow, elongated, distinctly keeled in 27-31 series, the most 

 usual number being 29. Scales on the top of the head very small, 

 almost tubercular, equal ; one (rarely two) small azygous shield be- 

 tween the supranasals which are of moderate size ; supraciliaries nar- 

 row, elongated, sometimes divided in two shields ; upper labials 11- 

 12, first united with the nasal, second forms the front of the facial pit, 

 third, as usually, the largest ; one long, linear infra-ocular extending 

 posteriorly, usually two small post oculars ; two rows of shields 

 between the infra-ocular and the labials. Ventrals* 174-184 ; anal 

 entire, narrowly semicircular and freely projecting ; subcaudals 55-76. 



The general color is light, or more usually dull green, with sever- 

 al series of dark alternately placed spots ; a white lateral streak on 

 the head beginning at the rostral ascending to the eye and then 

 continuing to the angle of the mouth is often present, it is margined 

 above and below with darker green, but it becomes obsolete with 

 age ; a narrow white lateral band begining at the posterior neck, 

 occupying half the width of the outermost row of scales on 

 either side, edged with dark below and extending up to the end of 

 the tail, is always present. Below, whitish or greenish with the bases 

 * B 1 y t h' s type of Cantoris bas 182 ventrals and 76 subcaudals. 



