SNAKES OF CEYLON . 



237 



Sublinguals : The posterior touching the 4th infra labial. 

 Infralabials : Four usually ; the fourth longer and broader 

 than the posterior sublinguals, touching two scales behind. 

 (Fig. 48.) 



Prf c Po 



Fig. 48. — Oligodon arnensis. 

 (X If.) 



Gostals : At midbody, breadth about three-fourths their 

 length, about two -thirds the ultimate row. Last three rows 

 gradually enlarging. Ultimate row about as broad as long. 

 In 17 rows to behind midbody, reducing to 15 by the absorp- 

 tion of the fourth row from the Ventrals. Ventrals : 167 to 

 202 ; subangulate laterally. Anal : Divided. Subcaudals ': 

 41 to 59 ; divided. 



