VENOMOUS SERPENTS. 189 



21 rows of lanceolate, carinated scales. S. 164 + 64. 

 From India, and also from the Isles of Sumatra, Celebes, 

 and Timor. 



- 8. Trigonocephalus puniceus. — Very distinguishable 

 by its eye protected above by a row of small scales, rising 

 to a point. Head very broad, heart-shaped, and flat on 

 the summit ; muzzle angular and excavated at the sides, tip 

 rounded and obliquely truncated. S. 162 + 54. Red- 

 dish-brown, dashed and varied with yellow, with purple, 

 or with grey ; tail very dark. Country, the Island of 

 Java. 



B. Species which have plates on the top of the head. — 

 9. Trigonocephalus Hhodostoma. — A very beautiful 

 species. Form very vigorous ; head heart-shaped, fur- 

 nished on the summit with 9 plates more than usually de- 

 veloped ; a very conical muzzle, with a moveable prominent 

 tip ; scales smooth, lozenge-shaped, and largest on the 

 middle line of the back, which is keeled ; tail short and 

 pointed. S. 147 + 55. Reddish brown, more bright on 

 the back, the sides of which are ornamented with broad, 

 dark, triangular spots ; summit of the head bordered with 

 a wide reddish ray ; a black streak behind the eye. Inha- 

 bits Java. 



10. Trigonocephalus Hypnale. — From Ceylon and 

 the Philippines. Size small ; muzzle prolonged into a sa- 

 lient turned-up tip ; above covered with scales, to which 

 succeed the vertical, the superciliary, and the occipital 

 plates; 19 rows of carinated scales. S. 142 + 40. Co- 

 lours of the body nearly as in the last. 



1 1 . Trigonocephalus Halys. — Form more slender than 

 usual ; head elongated, covered with 9 plates, of which the 

 anterior frontals are very compact ; muzzle short and 

 rounded; 27 rows of lanceolate, carinated scales. S. 165 

 + 37. Above yellowish grey, with 5 rows of brownish 

 spots. Observed in Tartary. 



12. Trigonocehalus Blomhoffii. — Plates on the head 

 nearly as in the last, but the form of the animal is more 

 clumsy, and the head larger ; 25 rows of strongly cari- 

 nated scales. S. 139 + 51. Above olive-brown, with two 



