54 



the snout, shorter than the parietals; loreal small, about twice 

 as deep as long ; two prae- and three or four postoculars 

 (lower of the latter perhaps a subocular); temporals 2 + 3 + 3, 

 the anterior very small; seven upper labials, third and fourth 

 entering the eye; five lower labials in contact with the anterior 

 chin-shields; latter shorter than the posterior, which are sepa- 

 rated by a scale. Scales in 19 rows; ventrals loi ; anal divided ; 

 subcaudals 59. 



Greyish above ; head reddish-brown with small, yellow dots ; 



Fig. 31. Xenochrophis viperinus Schenkel. Side view of head X 5- 



upper lip pale brown, with black spots on the lower part of 

 the posterior labials and a yellow longitudinal line, continued 

 on the sides of the neck and body as a yellow streak, inter- 

 rupted by about 30 black transverse spots. Lower surface 

 black; throat dotted with light. Length of head and body 

 176 mm.; tail 74 mm. 



Type-specimen received from the Basle Museum, examined. 



Habitat: Sumatra (Lidragiri I). 



9. Polyodontophis Boulenger. 



(BouLENGER, Fauii. Ind. Rept. p. 301, 1890). 



Head short, not or slightly distinct from neck; eye rather 

 small ; pupil round. Teeth very numerous, equal, 30 — 50 in 

 each maxillary; dcntary bone free from the articular poste- 

 riorly. Body round, long, covered with smooth scales, without 

 pits, in 17 or 19 rows. Tail long; subcaudals in two rows. 



Distribution. Madagascar; Comoro Islands; S. E. Asia; 

 C. America. 



A single species in the Indo-Australian region. 



I. Polyodontophis geminatus (Boie). 



Coluber gt'ininatuf.^ lioie, Isis 1826, p. 211. 



Folyodontophis gem'uiaius^ Boulenger, Cat. Sn. I 1893, p. 185 (s. syn.). 



