264 



COLVKRIB^. 



1. ElacMstodon westermanni. 



ElacListodon -westermanDi, JReinh. Overs. Dansk. Vid. Selsk. Forh. 

 1863, p. 206; Oitnth. Kept. Brit. Ind. p. 444 (1864); Blanf. 

 Journ. As. Soc. Beng. xliv. 1875, p. 207 ; Boulemg. Faun. Ind., 

 Eept. p. 363 (1890). 



Eostral twice as broad as deep, just reaching the upper surface 

 of the head ; internasals and praefrontals subequal in size ; frontal 

 rather longer than broad, as long as its distance from the end of 

 the snout, shorter than the parietals ; loreal small, longer than deep, 

 entering the eye ; a small prasocular above the loreal ; two post- 

 oculars ; two very long temporals ; six or seven upper labials, third 

 and fourth entering the eye ; three pairs of lafge chin-shields. 

 Scales in 15 rows. Ventrals 210-217 ; anal entire ; subcaudals 

 59-65. Brown above, with a yellowish vertebral stripe ; a yellowish 

 stripe commences on the snout and runs along each side of the head 

 to the temporals and the angle of the mouth ; an angular yellowish 

 cross-band on the nape ; lower parts yellowish. 



Total length 784 millim. ; tail 114." 



Bengal. 



Series C. PEOTEROGLYPHA. 



Divided into two subfamilies : — 



7. HydropTiiince. — Tail strongly compressed, with the neural 



spines and hypapophyses very much developed. 



8. Elajoince. — Tail cylindrical. 



Poisonous, the poison being conveyed mainly through the anterior 

 maxillary teeth, which are so folded as to appear hollow or per- 

 forated. 



Subfam. 7. HYDROPHIIN^. 



Hydri, Oppel, Ordn. Sept. p. 49, 1811. 



Hydrophidse, part., Boie, Isis, 1827, p. 610. 



Nauticophes, part., Lesson, in BUanger, Voy. Ind. Or., Sept. p. 320, 



1834. 

 HydridsB, Bonaparte, Mem. Ace. Torin. (2) ii. p. 393, 1839. 

 Hydridffi, part., Gray, Cat. Sn. p. 36, 1849. 

 Platycerques, Bumeril, Mtm. Ac. 8e. xxiii. p. 619, 1853 ; Dumiril 



^ Bibron, Erp. Qin. vii. p. 1607, 1854. 

 Hydrophidse., Cope, Proc. Ac. Fhilad. 1859, p. 333. 

 Hydrophidie, Jan, Elenco sist. OJid. p. 107, 1863. 

 Hydrophidse, Gunther, Bept. Brit. Ind. p. 352, 1864. 

 HydropMdse, Cope, Proc. Amer. Philos. Soc. xxiii. p. 480, 1886. 

 Hydrophiinse, Boulenger, Favn. Ind., Bept. p. 393, 1890. 



Tail strongly compressed, oar-shaped, with the neural spines and 



