11. LAcHEsts., 561 
obtusely keeled ; 10 to 12 upper labials, second usually separated 
from the shield in front of the loreal pit, third largest; first lower 
labial divided into two, forming a pair of additional chin-shields - 
behind the symphysial, Scales in 21 or 23 rows, dorsals feebly and 
obtusely keeled. Ventrals 144-176; anal entire; subcaudals 38- 
57. Tail prehensile. Grey, brown, or red above, with more or 
less distinct dark spots sometimes confluent to form a wavy dorsal 
band ; a light streak on each side of the head, behind the eye; belly 
powdered with dark brown, usually with a lateral series of yellowish- 
white spots ; end of tail red or reddish, 
Total length 640 millim. ; tail 90. 
Sumatra, Java, Borneo, Natuna Islands, 
a, ae (Se. 21; V.150; Java. Leyden Museum. 
b-d. 3S (Se. 23, 23; V. Willis Mts. Kediri, Baron v, Huegel[C.], 
_ 172, 176; C. 56, 67) Java, 5000 ft. 
(& 9 Be. 23; V. 162 ; 
e-f. 3 (Sc. 23; V. 166; Borneo. Sir H. Low [P.}. 
C. 56) & Q (Sc. 23; 
V. 166; C. 43). 
9: ae (Se. 21; V.162; Great Natuna Id. C. Hose, Esq. [C.]. 
9). 
h, a oe 21; VY. 160; Pulu Laut, Natuna Ids. C. Hose, Esq. [C.}. 
32. Lachesis borneensis. 
Atropophis borneensis, Peters, Ann. Mus. Genova, iii. 1871, p. 41. 
borneensis, part., F. Miill. Verh. Nat. Ges. Basel, viii. 1887, 
- p. 283. 
Bothrops sandakanensis, v. Lidth de Jeude, Notes Leyd. Mus. xv. 
1893, p. 256, fig. 
Closely allied to the preceding, but snout more prominent, 
strongly raised above the nostrils, upper head-scales larger (10 or 
11 between the supraoculars), and second upper labial forming the 
anterior border of the loreal pit. Scales in 19 or 21 rows. Ven- 
trals 152-168 ; anal entire; subcaudals 43-65. 
Total length 770 millim.; tail 105. 
Borneo, Sumatra. 
a. na ba 21; V. 162; Pankalan Ampat, Rajah Brooke [P.], 
Sarawak. 
Aas x (Se. 21; V.166; Baram R., Sarawak. C. Hose, Esq. [P.]. 
C. 53) & 9 ’ (Se. 21; 
¥: 161, C. 45). 
d, e. Her. 4 bik V. Mt. Dulit, Sarawak. OC. Hose, Esq. [C.]. 
157; C. 56) & v. (Se. 
19; V. 152; C. 713). 
iv, fe 21; V. 168; Paitan,N. Borneo, A. Everett, Esq. [C.] 
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