SNAKES OF CEYLON. 



261 



(b) Anomalies : Some of the subcaudal shields are rarely 

 entire. 



^f 'T'" ^ ^o 



^ i^ e27 



vs TSi 



Su if I ri^ua /j 



Fig. 52. — Cerberus rhynchops. 

 (XU.) 



Dentition. — Maxillary : Prsecranterian, 15 to 16. Cranterian, 

 a pair ; grooved ; not larger than the preceding. Palatine : 9. 

 Pterygoid : 22 to 25. Mandibular : 20 to 23. 



Distribution. — (a) General : Ceylon, Coasts of India, and 

 tidal-rivers from Sind and Mekran on the western side to 



