430 VIPERID^E. 



Trimeresurus viridis, Lacep. Ann. Mus. iv, 1804, p. 209, pi. Ivi, 



fig. 2 ; Gray, Cat. Sn. p. 7 ; id. A. M. N. H. (>) xii, Irf-M, 



p. 391. 



Trigonocephalus erythrurus, Cantor, P. Z. S. 1839, p. 81. 

 Trimesurus albolabris, Gray, Zool. Misc. p. 48. 

 Trigonocephalus gramineus, part., Cantor, J. A. S. B. xvi, 1847, 



p. 1040. 



Trimesurus elegans, Gray, A. M. N. H. (2) xii, 1853, p. 391. 

 Bothrops viridis,-Z>Mm. Bibt: Erp. Gen. vii, p. 1512. 

 Trimeresurus gramineus, Gilnth. Rept. B. I. p. 385 ; Stoliczka, J. A. 



S. B. xxxix, 1870, pt. 2, p. 216; Anders. P. Z. 8. 1871, p. 194; 



Theob. Cat. p. 219 ; Anders. Ann. Zool. Res. Yunnan, p. 828. 

 Trimeresurus erythrurus, Giinth. 1. c. p. 386 ; Stoliczka, I. c. p. 217 ; 



Fayrer, Thanatoph. pi. xiv ; Theob. Cat. p. 220. 

 Trimeresurus nmtabilis, Stoliczka, I. c. p. 219, pi. xii, tig. 5 ; Theob. 



I. c. p. 223. 



Rostral as deep as broad or broader than deep ; upper head- 

 scales small, smooth, imbricate ; supraocular shield narrow, rarely 

 broken up ; internasals in contact or separated by one or two 

 scales ; 8 to 13 scales on a line between the supraoculars ; usually 

 one or two, rarely three, series of scales between the subocular and 

 the labials ; 9 to 12 upper labials, second usually forming the an- 

 terior border of the loreal pit, third largest ; temporal scales smooth. 

 Scales more or less distinctly keeled, in 21 (rarely 19 or 23) rows. 

 Ventrals 145-175 ; anal entire ; subcaudals 53-75. Upper parts 

 usually bright green, rarely yellowish, greyish, or purplish brown, 

 with or without black, brown, or reddish spots ; usually a light, 

 white, yellow, or red streak along the outer row of scales ; end 

 of tail frequently yellow or red ; lower parts green, yellow, or 

 whitish. 



Total length 2| feet ; tail 5-5 inches. 



Hub. Southern China, Sikhim, Bengal, Assam, Burma, Cochin- 

 China, Siam, Andamans and Nicobars, Malay Peninsula and 

 Archipelago. 



532. Trimeresurus anamallensis. 



? Trigonocephalus (Cophias) malabaricus, Jerdon, J. A. S. B. xxii. 



1854, p. 523. 



? Trigonocephalus (Cophias) wardii, Jerdon, I. c. p. 524. 

 Trimeresurus anamallensis, Gilnth. Rept. B. I. p. 387, pi. xxiv, fig. C ; 



Fayrer, Thanatoph. pi. xiv ; Theob. Cat. p. 220. 



Eostral slightly broader than deep ; upper head-scales small, 

 smooth or obtusely keeled, imbricate ; supraocular shield rather 

 large, broken up into two or three ; internasals in contact or se- 

 parated by one scale ; 7 to 9 scales on a line between the supra- 

 oculars ; two or three small postoculars and a subocular ; the latter 

 shield separated from the fourth and succeeding labials by tvvo 

 rows (rarely one) of scales ; 9 or 10 upper labials, second forming 

 the anterior border of the loreal pit, third largest ; temporal scales 

 obtusely keeled. Scales feebly keeled, in 21 (rarely 19) rows. 

 Ventrals 138-158 ; anal entire ; subcaudals 44-58 pairs. Green, 



