56, XENELAPHIS. 7 
Nostril between a nasal and the first labial. 
117. Macrocalamus, II. p. 327. : 
d, Maxillary teeth small, subequal ; parietal in contact with 
labials ; eye small or very small. 
a. Nostril between two nasals. 
Loreal present, entering the eye. 
113. Geophis, II. p. 314, ©“ 
No loreal ; an azygous shield between the internasals. 
118. Idiopholis, II. p. 327. 
(. Nostril in a single nasal ; no loreal. 
* Nasal small. 
Eye moderately small; body extremely slender. 2 
115. Stilosoma, IT. p. 325. %¢o-“ 
Byeweryemiall: . 0 i 3 ts 119. Rhabdophidium, II. p. 328. 0 
** Nasal minute. 
Internasals present.......... 120. Pseudorhabdium, II. p. 328, 
No internasals ; eye free .... 121. Calamaria, II. p. 330. 
Eye concealed under the ocular shield. 
122. Typhlogeophis, II. p. 351. 
56. XENELAPHIS. 
Coryphodon (non Owen), part., Dum. § Bibr, Erp. Gén. vii. p. 180 
(1854) ; Giinth. Cat. Col. Sn, p. 107 (1858) ; Jan, Elenco sist. Ofid. 
p- 63 (1863). 
Xenelaphis, Giinth. Rept. Brit. Ind. p. 250 (1864); Bouleng. Faun. 
Ind., Rept. p. 836 (1890). 
Maxillary teeth 25 to 30, gradually increasing in size; anterior 
mandibular teeth a little enlarged. Head moderately elongate, dis- 
tinct from neck; eye moderate, with round pupil; a subocular 
Fig, 1. 
Maxillary and mandible of Xenelaphis hexagonotus. 
below the preocular. Body elongate, cylindrical ; scales smooth, 
with feebly marked apical pits, in 17 rows, the vertebral row 
