48 
Zoological Miscellany. 
II. Trimesurus. Scales lanceolate, keeled: hinder labial shields 
small ; head-scales convex or keeled ; superciliary shield single, half-ovate 
or linear. Confined to the Old World. 
* Second lahial -plate very high, forming the front of the suborhital pit : hack 
uniform, with a \ohiie line on each side. 
f Superciliary shield half-ovate. 
1. Trimesurus viridis,'L^Qep. C opliins viridis, M.exrem. Vipera viridis, 
Daud. Russel, Ind. Serp. t. 9, ii. t. 20. Coluber gramineus, Shaw. Tri- 
gonocephalus viridis, Schlegel, 544, t. 19, fig. 12, 13. Head-shields smooth, 
scales obscurely keeled. 
Inhabits India. Brit. Mus. 
2. Trimesurus albolabris. Green ; upper and lower lip, the upper 
part of the supra-abdominal row of scales, and the lower edge of the row 
above them, white: belly yellowish green, bluish on the sides: head-shields 
smooth, convex, scales obscurely keeled. 
Inhabits China. Brit. Mus. 
3. Trimesurus carinatus. Green ? scales large, strongly keeled, the 
supra-abdominal series with a white central streak ; head-shields convex, 
rounded. 
Inhabits India. Brit. Mus. 
ff Superciliary shield linear, rudimentary. Tropidolsemus, Wagler. 
4. Trimesurus purpureus. Trigonocephalus purpureo-maculatus. Gray 
Illust. Ind. Zool. t. Purple, (in spirits red brown) ; lateral streak 
and beneath whitish ; head-shield convex, smooth. 
Inhabits Singapore. Brit. Mus. 
The second labial plate much smaller thorn the third, with a square shield 
above it, which forms the front edge of the suborbital pit : head large : 
back spotted or banded, without any continued pale lateral line. 
6. Trimesurus maculatus. Green, with a series of small, distant, white 
spots on each side ; temporal streak white : head-shields keeled : end of 
tail rufous, curled. 
Inhabits Singapore. Brit. Mus. 
Var. 1, with distant white spots on the side of the belly. 
Inhabits the Philippine Islands ; Mr. Cuming. Brit. Mus. 
7. Trimesurus subannulatus. Green, with a series of distant, narrow, 
white cross bands, edged with black in front, and ending in a spot at the 
side of the abdomen : occiput with 2 black spots : abdomen whitish, hinder 
part with a few black spots : end of tail green, black and white ringed : 
head-shields keeled. 
Var ? Young, the white bands varied with brown in front, and the spots 
on the side and hinder part of the belly brown ; tail dark red-brown. 
Inhabits the Philippines ; Mr. Cuming. Brit. Mus. 
8. Trimesurus Philippensis. Green, with a series of black spots on each 
side of the back ; lips and beneath yellow, with distant, small, black spots 
on each side, near the edge of the abdominal plates : temporal streak black- 
ish: tail black-banded, end red, compressed and curved; head-shields keeled. 
Inhabits Philippine Islands ; Mr. Cuming. Brit. Mus. 
9. Trimesurus Sumatranus. Coluber Sumatranus, Raffles. Trigonoce- 
phalus ornatus, Gray. Cophias Wagleri, Boie. Trigon. Wagleri, Schlegel, 
