SNAKES. 15 
tt Head large, triangular, cordate. Trigonocephalus. 
4, The Outar Donpa.  Trigonocephalus rhodostoma, Reinw. 
Isis, 1827, 561. Wagler, Amph. 174. Schlegel, P.S. ii. 547, t. 20, f. 
1—3. Abbild. 19, t.19, animal and skull. Nova Act. N. C. xiv. 
t. 16, f.4—9, skull. Seba, ii. ¢. 68, f. 6, young (bad). Coluber, 
No. 21, Russell, Ind. Serp. ii. t. 21 (good). Vipera pretextata, 
Gravenh. Trigonocephalus pretextatus, Hemprich. Fitz. N. Class. 
62. 
Red-brown, with rhombic spots; sides brown, spotted ; beneath 
white: head large, triangular ; crown flat, with a dark-edged whitish 
streak on each side. 
a. In spirits. Java. From the Leyden Museum. 
** End of nose with small scales in front. Hypnale. 
5. The Carawitia. Trigonocephalus Hypnale, Wagler, Syst. 
174. Schlegel, P. S. ii. 550, t. 20, f. 6,7. Cophias Hypnale, Mer- 
rem, Tent. 155. Coluber Nepa, Laur. Syn.97. Seba, Thes. i. t. 19, 
f. 7; ii. t. 55, f. land 4. Scheuch. P. S. t. 749, f. 11. Carawilla, 
Davy, Ceylon, 85, t. 2, f.1. Cop., Russell. Ind. Serp. ii. t. 22 (var. 
muzzle blunt). ‘Trimesurus? Ceylonensis, Gray, Zool. Misc. 48. 
Scales keeled ; lips brown, white spotted: brown, sides darker 
and varied; tail brown, cross-banded: head brown, marbled with a 
broad white streak on each side, extending down the back of the 
neck, which is streaked with brown; nose more or less produced, 
(‘‘ upper surface covered with small scale-like shields.” Schlegel.) 
a. In spirits. Ceylon. Presented by R. Templeton, Esq. 
6. The Zara. Trigonocephalus Zara. 
Brown ; slightly brown varied, minutely punctated below; side 
of the neck datk brown, white varied: head with a narrow white 
streak on the upper part of the temple, and a broader white streak 
on the lower side of the neck; lips brown, with one or two small 
white spots behind. 
a. In spirits. Singapore. From Mr. Argent’ collection. 
b. Subcaudal plates one-rowed ; tail ending ina spine ; head shielded. 
America. Cenchrina. 
8. CENCHRIS. 
Head shielded; tail ending in a spine; subcaudal plate entire, 
one-rowed. 
c2 
