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. 



fi. Nostril in a single nasal ; no loreal. 



* Nasal smaU. 



Eye moderately small ; body extremely slender. 



115. Stilosoma, TI. p. 325. 



Eye very small 119. RhabdopMdium, II. p. 328. 



** 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., Dimi. i^- Bibi: Ei-p. Gen. vii. p. 180 

 (1854) ; Giinth. Cat. Col. Sn. p. 107 (1858) ; Jan,Elenco sist. Ofid. 

 p. 63 (1863). 



Xenelapiiis, Giinth. JRept. Brit. Ind. p. 250 (1864) ; Bouleng. Faun. 

 Ind., Rept. p. 336 (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 Xenelapkis hexagoiiotus. 



below the prseocular. Body elongate, cylindrical ; scales smooth, 

 with feebly marked apical pits, in 17 rows, the vertebral ro^^■ 



