SNAKES OF CEYLON. 



261 



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

 entire. 



**' *r J A 



^ & EZ7 



r XT VS. 



Su6/t ng**a/j 



Fig. 52. — Cerberus rhynchops. 



(xlh) 



Dentition. — Maxillary : Praecranterian, 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 



