8 COLUBRID. 
slightly enlarged and six-sided; ventrals rounded. Tail long; 
subcaudals in two rows. 
Burma, Malay Peninsula and Archipelago. 
£ 
1, Xenelaphis hexagonotus. 
Coluber hexahonotus, Cantor, Cat. Mal. Rept. p. 74 (1847). 
Coryphodon sublutescens, Dum. § Bibr. vil. p. 187 (1854). 
hexanotus, Giinth. Cat. p. 110 (1858). 
Xenelaphis hexahonotus, Giinth. Rept. Brit. Ind. p. 251, pl. xxi. 
fig. C (1864). ; 
Ptyas hexagonotus, Theob. Cat. Rept. Brit. Ind. p. 168 (1876). 
Xenelaphis hexagonotus, Bouleng. Faun. Ind., Rept. p. 336 (1890), 
Rostral broader than deep, visible from above ; internasals as long 
as or a little longer than the prefrontals; frontal once and one 
third to once and a half as long as broad, as long as its distance 
from the end of the snout, a little shorter than the parietals ; loreal 
nearly as long as deep; one preocular, with a rather large sub- 
ocular below it, wedged in between the third and fourth upper 
labials ; two postoculars, with a large subocular below, separating 
the eye from the fifth and sixth labials; a third subocular occa- 
sionally present, separating the eye altogether from the labials; 
temporals 242; normally eight upper labials, fourth entering the 
eye; four or five lower labials in contact with the anterior chin- 
shields, which are as long as the posterior. Scales smooth, in 17 
rows. Ventrals 185-198; anal divided; subcaudals 140-179. 
Brown above, with black cross bands, which become indistinct with 
age, on the anterior half of the body; old specimens showing mere 
traces of the outer ends of these bands; lower parts uniform 
yellowish. 
Total length 1650 millim.; tail 600. 
Burma, Malay Peninsula, Borneo, Sumatra, Java. 
a. Yg. (V. 188; C. 148). Pinang. Dr. Cantor. (Type.) 
b,c. d (V.187; C. 140) Singapore. Gen. Hardwicke [C.]. 
& 2 (V.198; C. 140). 
d. 3 (V.191; C. 149). Singapore. W. T. Blanford, Esq. fet 
e. 9 (V. 190; C. 144). Borneo. L. L. Dillwyn, Esq. [P.1. 
ft. 3 (V. 185; C.179). Borneo. Sir J. Brooke [P.]. 
g. & (V. 190; C.?). Rejang R., Sara- Brooke Low, Esq. [P.]. 
wak, 
h. 3 (V. 187; C.173). —P Dr. Bleeker, (Dendrophis 
; dumerilii, Blkr.) 
t. Yg. (V. 192; C. 175). ——? Dr. Bleeker. (Adlabes 
olyhemizona, Blky. 
k. Skull. Sarawak. ah : ) 
57. DRYMOBIUS. 
Coluber, part., Schleg. Phys. Serp. ii. p. 125 (1837); Dum. & Bibr. 
Mém. Ac. Se, xxiii. 1853, p. 455. 
Herpetodryas, part., Schleg. . c. p. 173; Dum. & Bibr. Erp. Gén. vii 
