330 ON THE rUYSIOGNOMY OF SERI'ENTS. 



10. CoROXELLA RUFESCEXS IS aiiotlicr Ciipe species, very 

 diflfcrent 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 i>erpendicularly elongated ; and has a posterior grooved 

 tooth in the jaws."^ S. 160 -^ 45. R. S. 19. 



11. CoROXELLA RUFULA approaches to the Lycodons by 

 its form, and its front teeth longer tlian the rest ; but the 

 pupil of the eye is obicular, and the j)lates on the head 

 are more elongated. It is of an nniform brown verging 

 on red, and has a tail very thick, and much longer than 

 usual. S. 157+ 110. Pi. S. 19. 



12. CoROXELLA AURORA is ouc of the most beautiful 

 and rarest species. It is very distinguishable by its tints ; 

 yellow below, yellowish lirown above ; the back is marked 

 by a wide ray of an orange-yellow, Avhich 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 

 tem])oral plates take the form of scales, and the abdominal 

 scuta are very compact, S, 180 -j- 46. R. S. 19. 



We come, finally, to two Asiatic species, a little anoma- 

 lous ; the first is, — 



13. CoRoxELLA ocTOLixEATA, whicli has a thin bod}', 

 a narrow abdomen, a little angidar 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 whicli the lateral are sometimes 

 double : these rays are prolonged on the head, where they 

 form an acute angle, S. 178 -|- 52, R, S. 17. 



14. CoROXELLA RussELii, a vcry 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. 



