SNAKES OF CEYLON. 



145 



infralabial. Infralabials : Four ; 4th largest, longer than the 

 posterior sublinguals, and about as broad, touching two scales 

 behind. (Fig. 33.) 



Fig. 33. — Haplocercus ceylonensis. 

 (X 2|.) 



Costals: At midbody. Longer than broad, rectiform 

 keeled, except the last two or three rows. Vertebrals not 

 enlarged, the breadth of the scales half their length, and half 

 the ultimate row. Last five rows progressively increasing in 

 breadth. Ultimate row broadest, its scales about as broad as 

 long. Li 17 rows in the whole body length. Ventrals: 177 to 

 217 ; rounded. Anal : Entire. Supracaudals : In odd rows, 

 keeled to the tip of the tail. Suhcaudals: 37 to 56 ; entire. 



(6) Anomalies: The supralabials are sometimes six. 



Dentition, — From two skulls in my collection. Maxillary : 

 11 to 12. Palatine: 9 to 10. Pterygoid : 19 to 21. Man- 

 dibular : 10 to 12. 



24 6(6)20 



