JOURNAL, R.A.S. (CEYLON). [VOL. XL 



K = 3 Python molurus. 



Occiput scaly ; snout with irregular shields ; rostral 

 and some of the labials deeply pitted ; no chin shields. 

 3 P. molurus. 



L = 59 Ancistrodon h YPN ale. 



Large frontal and parietal shields, but the snout is 

 scaly. 59 A. hypnale. 



ffl = 57 Viper a russellii. 

 Head almost entirely scaly. 



1. — A narrow supraciliary shield ; three nasals. 57 V. 



russellii. 



2. — A pair of very small frontals ; nasal subdivided. 58 



E. carinata. 



3. — Two front scales on snout large ; nasal single. 60 T. 



trigonocephalus. 



|\| = 1 Typhlops braminus. 



A large rostral projecting backwards, flanked by large 

 nasals, covers the snout ; there is a prae-ocular shield 

 and an ocular and a few labials ; the other shields are 

 scarcely larger than the scales. 



1. — No sub-ocular ; ocular in contact with third or fourth 



labials ; nasal completely divided ; anterior nasal in 

 contact with prse-ocular. 1 T. braminus. 



2. — A sub-ocular separating ocular from third labial ; nasal 



completely divided ; ocular in contact with fourth 

 labial. 2 T. mirus. 



EYES. 



A = 24 Zamenis mucosus. 

 Pupil round. 

 L— Large. 24. 25, 27, 28. 

 2.— Rather large. 29, 39. 



