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ON THE PHYSIOONOMY OF SEEPENTS. 
forms the collar, and a spot on the muzzle. S. 136 + 30. 
Inhabits Java. 
4. Homalopsis Leucobalia. — A species remarkable 
by the form of its head, which is very large, thick, and 
high, rounded at the narrow top, which is covered by 8 
small plates ; the eyes are very small, and the upper 
labial plates on,ly amount to 5 in number ; one anterior 
and two posterior oculars ; 25 ranges of smooth, lozenge- 
shaped scales. Above blackish ; irregular bands on the 
sides; below whitish. S. 154 + 33. Form very heavy. 
Inhabits the island of Timor. 
5. Homalopsis plumbea. — Form less thick than in 
the preceding. Head broad and rounded, with 8 plates 
on the summit ; 19 rows of smooth and square scales ; 
tail much concentrated. From Java. S. 121+37. A 
grooved, posterior maxillary tooth. Above leaden coloured, 
below whitish. 
6. Homalopsis Aee.— Very analogous to the preceding, 
but the head more elongated ; the muzzle less broad, small, 
and covered by smaller scales ; trunk more compressed, 
and the tail more slender. 25 rows of lozenge- shaped 
scales. S. 118 + 52. Colour leaden, verging on brown, 
with two pale dorsal rays ; sides yellow, with a dark-co- 
loured ray. It is found in Java and Bengal. 
7. Homalopsis Sieboldii. — Trunk more than usually 
compressed ; back very angular, from the strong carina 
which it forms ; abdomen very narrow ; 29 ranges of 
smooth scales ; form massive ; head almost as in H. buc- 
cata, but less obtuse, with a more narrow summit ; labial 
plates less numerous ; the eye larger ; there are also two 
anterior frontals. Above of greyish brown, verging on 
purple : a colour almost covered by several series of very 
large dark spots ; below yellow, marbled with brown. 
S. 147 + 51. From Bengal. 
8. Homalopsis carinicauda. — Inhabits both Americas. 
Allied to H. plumbea of Java ; but it has a head more 
lengthened, and a more slender tail ; also a more ample 
eye, and the scales are truncated at the tip, and surmounted 
by a strong keel, though only visible on the posterior parts. 
