284 



giri, Tandjung Morawa, Kertadjaja, Tandjung Laut in Palem- 

 bang); Banka!; Biliton; Borneo (Mt. Dulit, Baram, Bandjer- 

 massin). Singapore; Malay Peninsula, abundant at elevations 

 of 2000 3000 feet; Palawan. 



3. Lachesis fasciatus Boulenger. 



Lachesis fasciatus^ Boulenger, Ann. Nat. Hist. (6) XVIII 1896, p. 63. 



Snout a little turned up, with strong edge. Rostral more 

 broad than deep; nasal entire; scales on the head small, smooth 

 on the snout and between the eyes, obtusely keeled on the 

 occiput; supraocular large; one scale between the internasals, 

 which are large; 6 scales between the supraoculars; two post- 

 oculars; a subocular, separated from the labials by one series 

 of scales anteriorly, two posteriorly; nine or ten upper labials, 

 first fused with the nasal, second bordering the loreal pit, 

 third largest; temporal scales obtusely keeled. Scales feebly 

 keeled, in 21 rows; ventrals 162; anal entire; subcaudals 60, 

 in two rows; tail feebly prehensile. 



Grey-brown above, with numerous dark olive transverse bands, 

 some of them broken up on the vertebral line and alternating; 

 head uniformly dark olive. Lower surface whitish, speckled with 

 dark brown. Length of head and body 375 mm.; tail 80 mm. 



Type-specimen examined in the British Museum. 



Habitat: Djampea Island!. 



4. Lachesis purpureomaculatus (Gray). 



Trigonocephalus purpureomaculatus, Gray, 111. Ind. Zool. II 1832, pi. LXXXI. 

 Lachesis purpureomaculatus, Boulenger, Cat. Sn. Ill 1896, p. 553 (s. syn.). 



Snout short; eye small. Rostral as broad as deep; nasal 

 entire; scales on the head very small, convex or obtusely 

 keeled; supraocular very narrow, sometimes broken up; one 

 or two scales between the internasals, which are small; 12 15 

 scales between the supraoculars; two or three small postocu- 

 lars; a subocular, separated from the labials by two or three 

 series of scales; eleven to thirteen upper labials, first usually 

 fused with the nasal, second usually bordering the loreal pit 

 anteriorly, fourth and rest small; temporal scales keeled. Scales 

 strongly keeled, in 25 or 27 rows; ventrals 160 182; anal 

 entire; subcaudals 55 76, in two rows; tail slightly prehensile. 



Purplish-brown or blackish above, uniform or variegated 



