202 JOURNAL, R.A.S. (CEYLON). [VOL. XI. 



D = 43 BUNGARUS CBYLONICUS. 



As in a ; sub-caudals simple ; anal entire. 10 to 14, 43, 

 44, 58. 



£ - 16 Lycodon carinatus. 



Ventrals keeled ; sub-caudals simple ; anal entire. 16. 



§€AIE§. 



A = 24 Zamenis mucosus. 



Scales confined to the back and sides, imbricate, 

 polished smooth, or but partially or feebly keeled. 



1. — Scales moderate, with apical pits, feebly keeled in the 



posterior part of the back. 24. 



2. — With apical pits. 17, 25, 39. 



3. — Feebly keeled on the posterior part of the body and 



tail. 26. 



4. _Smooth. 10 to 13, 15, 18 to 23, 41, 42, 45, 60 (or feebly 



keeled). 



5. — Smooth, very small. 3. 



B == 31 Tropidonotus asperrimus. 



As in a, but the scales are distinctly keeled. 



1. -No serrated keels. 14, 16, 29 to 33, 40, 57, 59. 



2. — Keels on lateral scales serrated. 58. 



C = 43 BUNGARUS CEYLONICUS. 



As in a, but with a larger series of polygonal vertebral 

 scales. 43, 44. 



D = 37 Dryophis mycterizans. 



Scales very imbricate, quadrilateral (rhombic on the 

 anterior part of the body). 37, 38. 



E — 35 DlPSAS CEYLONENSIS. 



As in d, but with a larger series of polygonal vertebral 

 scales. 27, 28, 35 to 39. 



