72 OPHIDIANS. 
No. 24. H. hydr. Elliottii. Indian coast; Ceylon. 
25. ee pachycereus. Indian Ocean. 
26. PS viperina. Indian coast. 
27. curta. Indian coast, near Pooree. 
28. se Hardwickii. | Penang. 
29. 2 Fayreriana.* Indian coast, Bay of 
Bengal, Pooree. 
30. « tuberculata.* Tidal streams, near Cal- 
cutta, 
31. a erassicolis.* Bay of Bengal. 
32. “< Stewartii.* Bay of Bengal. 
33. ig nigra.* Bay of Bengal. 
Nos. 1, 4, 8, 10, 12, 15, 22, 27 are Giinther’s, and Nos. 
29, 30, 31, 32, and 33, are classified by Dr. Anderson. 
Experiments made with the poison of several of these varie- 
ties prove it to be very deadly. Fangs are small and grooved, 
the involution not being so complete as in the fangs of land 
snakes. They possess a strong family resemblance to each 
other. Giinther’s general description of the genus is as fol- 
lows, viz.: 
Posterior part of body strongly compressed; head short, or of a mod- 
erate length, shielded above; one pair of frontals ; nostrils superior in a 
single nasal; both contiguous; scales imbricate or not so, not polished, 
generally carinated; ventral shields very narrow, or quite rudimentary, 
or absent; lower jaw without the notch in front. 
Giinther describes the following, viz.: 
Species No. 1. Hydroph. Jerdonit. 
Hydrus nigrocinctus, Cantor. 
Kerilia Jerdonii, Gray. 
Abdominal scuta 235-288, bituberculate. Head short; rostrum de- 
* Anderson, 
