11. LACHESIS. 



661 



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. Hgr. (Sc. 21 ; V. 150 ; Java. Leyden Museum. 



C. 38). 

 J-(Z. cJ (Sc. 23, 23 ; V. Willis Mts., Kediri, Baron v.Huegel[C.]. 



172, 176 ; 0. 50, 57) Java, 6000 ft. 



& $ (Sc. 23; V. 162; 



C. 46). 

 e-/. S (Sc. 23 ; V. 166 ; Borneo. Sir H. Low [P.]. 



C. 56) & § (Sc. 23 ; 



V. 166 ; 0. 43). 

 g. Yg. (Sc. 21 ; V. 162 ; Great Natuna Id. 0. Hose, Esq. [0.]. 



C. 49). 

 A. 2 (Sc. 21 ; V. 150 ; Pulu Laut, Natuna Ids. 0. Hose, Esq. [C.]. 



C. 38). 



32. Lachesis borneeusis. 



Atropophis borneensis, Peters, Ann. Mus. Oenova, iii. 1871, p. 41. 

 : borneensis, part., F. Miill. Verh. Nat. Ges. Basel, viii. 1887, 



p. 283. 

 Bothrops sandakanensia, 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. g (Sc. 21 ; V. 162 ; Pankalan Ampat, Rajah Brooke [P.]. 



C. 48). Sarawak. 



b-c. cf (Sc. 21; V. 166; Baram R., Sarawak. 0. Hose, Esq. [P.]. 



C. 53) & 9 (Sc. 21; 



V. 161 ; 0. 45). 

 d, e. Hgi\ (Sc. 21 ; V. Mt. Dulit, Sarawak. 0. Hose, Esq. [0.]. 



157 ; 0. 66) & yg. (Sc. 



19; V. 152; 0.43). 

 /. S (Sc. 21 ; V. 168 ; Paitan, N. Borneo. A. Everett, Esq. [C] 



C. 65). 



VOL. III. 



2o 



