136 
ON THE PHYSIOONOMY OF SEEPENTS, 
10. CoRONELLA RUFESCENS is another Cape species, very 
different from the last, and is recognised by its uniform 
hue of a pale brownish-purple, and by a large, dark, nu- 
chal mark. Below it is yellow : it has the pupil of the 
eye perpendicularly elongated ; and has a posterior grooved 
tooth in the jaws. S. 160 -f 4^5. B. S. 19. 
1 1 . CoRONELLA RUFULA approaches to the Lycodons by 
its form, and its front teeth longer than the rest ; hut the 
pupil of the eye is obicular, and the plates on the head 
are more elongated. It is of an uniform brown verging 
on red, and has a tail very thick, and much longer than 
usuaL S. 157+110. B. S. 19. 
12. CoRONELLA AURORA is One of the most beautiful 
and rarest species. It is very distinguishable by its tints ; 
yellow below, yellowish brown above ; the back is marked 
by a wide ray of an orange-yellow, which passes along the 
animal through its whole length. It has an aspect more 
heavy than ordinary ; its very thick tail only begins to 
diminish towards the point. The muzzle is obtuse ; the 
temporal plates take the form of scales, and the abdominal 
scuta are very compact. S. 180 + 46. B. S. 19. 
We come, finally, to two Asiatic species, a little anoma- 
lous ; the first is, — 
13. CoRONELLA OCTOLTNEATA, whicli has a thin body, 
a narrow abdomen, a little angular at the sides. There 
exist only six labial plates, and a frenal at each side ; the 
rostral is large, and extends between the frontals. We 
find, on a brownish-yellow ground, four longitudinal, 
dark, dorsal rays,' of which the lateral are sometimes 
double : these rays are prolonged on the head, where they 
form an acute angle. S. 178 + 52. B. S. 17. 
14. CoRONELLA BussELii, a very handsome species, in- 
habiting Bengal. It approaches certain Xenodons, of 
which it has the dentary system, especially of the Xeno- 
don purpurascens, which it also resembles in the distri- 
bution of its colours. The muzzle is obliquely truncated 
downwards : it has seventeen rows of lanceolate scales. 
Above earth-brown, relieved by a series of large patches, 
chequered, and little constant in shape. There are on the 
head several angular markings. S. 155 + 54. 
