270 COLtlBEIDJE. 



n. cT (V. lOo ; C. 02). Madagascar. (Type.) 



h. 2 (V. 166; C. 59). Madagascar. 



c. S (V. 170; C. 56). Imerina. Eev. R. Baron [C.]. 



(I Ilgr. (V. 162 ; C. 54). S.E. Betsileo. Mr. T. Waters [C.]. 



13. PSEUDOXENODON. 



Xeiiodon, part., Boic, Isi's, 1827, p. 540; Sc/iler/. Phys. Serp. ii. p. 80 

 (1837) ; Giinth. Cat. Col. Sn. p. 53 (1858) ; Jan, Arch. Zool. Anat. 

 Phys. ii. 1863, p. 316. 



Xenodon, Wayl. Syst. Amph. p. 171 (1830). 



Tropidonotus,'part., Gwdh. Rept. Brit, huh p. 258 (1864). 



Pseudoxeuodon, Bouleny. Faun. Ind., Rept. p. 340 (1890). 



Maxillary teeth 20 to 28, increasing in size posteriorly, the two 

 last abruptly enlarged and separated from the others by an inter- 

 space; mandibular teeth subequal. Head distinct from neck, which 

 is dilatable ; eye large, with round pupil. Body cylindrical ; scales 

 on the anterior part of the body disposed obliquely, narrow and 

 much imbricate, in 17 or 19 rows ; dorsals keeled ; no apical pits : 

 ventrals rounded. Tail moderate ; subcaudals in two rows. Hypa- 

 pophyses developed throughout the vertebral column. 



East Indies and Southern China. 



Synojisis of the Species. 



One praeocular ; scales in 19 rows ante- 

 riorly ; ventrals 158-173 ; subcaudals 

 55-75 1. macrojjs, p. 270. ^ 



One praeocular ; scales in 17 rows ante- 

 riorly ; ventrals 14U ; subcaudals 51 . 2. dorsalis, p. 271. 



Tsvo or three praeoculars ; scales in 19 rows ; 



ventrals 118-121 ; subcaudals 36-41 . . 3. inornatus, p. 272. 



1. Pseudoxenodon macrops. 



Tropidonotus macrops, BIytk, Journ. As. Soc. Beny. xxiii. 1855, 



p. 296 ; Giinth. Rept. Brit. Ind. p. 263 (1864) ; Stoh'czka, Journ. 



As. Soc. Beng. xl. 1871, p. 436; Theoh. Cat. Rept. Brit. Ind. 



p. 174 (1876). 

 • angusticeps, part., Blyth, I. c. p. 295 ; 71'. L. Sclater, Journ. 



As. Soc. Beny. Ix. 1891, p. 240. 

 Xeuodou macrophtluilmus, part., Giinth. Cat. p. 58 (1858). 

 Tropidonotus macrophtlialmus, part., Giinth. Rept. Brit. Ind. p. 262, 



pi. xxii. fig. 0. 



macrophtbalmus, Anders. Proc. Zool. Soc. 1871, p. 77. 



sikkimensis, Anders. Journ. As. Soc. Beny. xl. 1871, p. 17. 



Pseudoxenodon macrops, Bouleny. Faun. Ind., Rept. p. 340 (1890). 



E-ostral just visible from above; internasals shorter than the 

 pra^frontals ; frontal once and one fourth to once and one third as 

 long as broad, as long as or slightly shorter than its distance from 

 the end of the snout, shorter than the parietals ; loreal as long as 



