356 COLTJBRIDJ3. 



About 100 scales round the middle of the body, dorsals largest. 

 Dark olive or blackish, with pale cross bands or annuli, which may 

 become indistinct in the adult. 



Total length 3 feet 4 inches ; tail 4 inches. 



Fig. 104. Chersydrus granulatus. 



Hob. Mouths of rivers and coasts of Southern India, Burma, 

 Malay Peninsula and Archipelago, and New Guinea. This snake 

 never leaves the water and occurs miles out at sea ; it is viviparous 

 and feeds on fish. 



Series B. OPIS THOGL YPH A. 



Posterior maxillary teeth grooved. 



Subfamily III. DIPSAD1N.E. 



Nostrils lateral. Terrestrial or arboreal. 

 Represented in every part of the world. 



Synopsis of Indian, Ceylonese, and Burmese Genera. 



A. Posterior border of ventral shields with- 

 out lateral notch. 



a. Only posterior grooved fangs of maxilla 

 enlarged ; scales of vertebral row en- 

 larged ; pupil vertically elliptical. 

 a'. Head very distinct from neck DIPSAS, p. 357. 



