96 



the nostril in the upper part of a single shield. Scales 19, 

 keeled. Anal bifid. 



X. CERASOGASTER, CautOT. 



Ventrals 141-149, subc. 60-69. Shields of the crown elon- 

 gate. Labials 9 (4). Brown, with lighter dorsal stripe or 

 dorsal series of dark spots ; belly purple, marbled ; bright 

 yellow lateral line beginning at the snout. 

 Bengal, Assam, Straits. 



PRYMNOMIODON, Cope. 



A Tropidonotus with minute teeth much enlarged ante- 

 riorly. Head-shields normal. Scales 19, keeled. 



P. CHALCEUS, Cope. 



Ventrals 152. Green. A solitary museum specimen. 

 Siam. 



CADMUS. 



A genus made by Mr. Theobald for a Tropidonotus of 

 stout form, with 27 rows of smooth scales. Rostral large 

 and penetrating between the small anterior frontals. 

 Labials 7 (4). 



C. CUNEIFORMIS, Thcohald. 



Olive brown, with two dorsal rows of black spots. 

 A solitary museum specimen. 



Family XIV.— DENDROPHIDiE. 



Body and tail either much compressed or very slender ; 

 head rather long, flat, and distinct from the slender neck ; 

 snout moderate or long, rounded. Eye moderate or large, 

 pupil round. Head-shields normal ; scales much imbricate ; 

 ventrals with two keels ; anal bifid. 



GONYOSOMA, Wagler. 

 Body long, compressed, head moderate. Loreal some- 

 times absent, preocular one. Scales generally smooth. Ven- 

 trals above 200. 



