56. XETELAPHI8. 7 



Noetril 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. 



/3. Nostril in a single nasal ; no loreal. 

 * Nasal small. 



Eye moderately small ; body extremely slender. 



115. Stilosoma, II. p. 325. 



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



** Nasal minute. 



Internasals present 120. Psendorhabdium, II. p. 328. 



No internasals ; eye free 121. Calamaria, II. p. 330. 



Eye concealed under the ocular shield. 



122. Typhlogeophis, II. p. 351. 



56. XENEL APHIS. 



Coryphodon (non Oicen), part., Dum. # Sibr. Erp. G&t. vii. p. 180 

 (1854) ; Gimth. Cat. Col. Sn. p. 107 (1&58) ; Jan,Elenco sist. Ofid. 

 p. 63 (1863). 



Xenelaphis, Giinth. Kept. Brit. Ind. p. 250 (1864) ; Bauleng. Fmm. 

 Ind., Kept. 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 Xenelaphis hexagonotiu. 



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

 with feebly marked apical pits, in 17 rows, the vertebral row 



