170 ON THE PHYSIOGNOMY OF SEEPENTS. 



forms the collar, and a spot on the muzzle. S. 13G + 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 only amount to 5 in number; one anterior 

 and two posterior ocularj? ; 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. — Fomi Icss thick than in 

 the preceding. Head broad and rounded, ^^'ith 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 Aer. — 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. 148 + 52. Colour leaden, verging on brown, 

 with two pale dorsal rays ; sides yelloAv, with a dark-co- 

 loured ray. It is found in Java and Bengal. 



7. HoMALOPSis Sieboldii. — Trunk more than usually 

 compressed ; back very angulai*, 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 naiTow summit ; labial 

 plates less numerous ; the eye larger ; there are also two 

 anterior frontals. Above of gi-epsh brown, verging on 

 puii^le : 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 sumiounted 

 by a strong keel, though only visible on the posterior parts. 



