73 



Habitat: Nias!; Sumatra (Labuan, Deli!, Langkat, Lebong 

 donok!); Banka!; Natuna Islands; Borneo (Mt. Mulu 2000 feet, 

 Kuching, Sibu, Buntok, Balikpapan). — Penang; Malay- 

 Peninsula. 



3. Zaocys carinatus (Gunther). 



Coryphodon carinatus^ part., Gunther, Cat. 1858, p. 112. 



Zaocys carinatus^ BouleDger, Cat. Sn. I 1893, p. 377, pi. XXVII, fig. i. 



Rostral more broad than deep, visible from above; inter- 

 nasals shorter than the praefrontals; frontal as long as its 

 distance from the rostral, shorter than the parietals; two or 

 three loreals; one praeocular; a subocular; two postoculars; 

 temporals 2 + 2; nine upper labials, fifth and sixth entering the 

 eye; five lower labials in contact with the anterior chin-shields; 

 latter much shorter than the posterior. Scales in 16 or 18 rows, 

 the two or four median rows keeled; ventrals 208 — 215; anal 

 divided; subcaudals no — 118. 



Olive-brown or blackish in the anterior part, with yellow 

 spots or irregular transverse bands, pale brown or yellowish 

 with a black network posteriorly. Lower surface yellowish, 

 black and yellow posteriorly. Length of head and body 2250 mm.; 

 tail 750 mm. 



Type-specimen examined in the British Museum. 



Habitat: Sumatra (Labuan in Deli, Gunung Sugei in Lam- 

 pong district); Borneo! (Kuching, Sebruang Valley); Java 

 (Depok). — Singapore; Malay Peninsula. 



14. Tropidonotus Kuhl. 



(KUHL, in Ferussac, Bull. Sc. Nat. II p. 81, 1824). 



Head generally distinct from neck; eye moderate or large; 

 pupil round. Maxillary teeth 18 — 40, continuous, posterior 

 longest; mandibular teeth about equal. Body long, round, 

 covered with smooth or keeled scales, usually with pits, in 

 15 — 33 rows; ventrals rounded. Tail long; subcaudals in 

 two rows. 



Distribution. Europe; Asia; Africa; N. Australia; N. and 

 C. America. 



The snakes of this genus live in the neighbourhood of water, 

 feeding on frogs and fish. Oviparous, laying 10 — 40 eggs. 



