2(5. ],I0CEPHALU8. 167 



9. Liocephalus aculeatus. (Plate XI.) 



Leiocephalus aculeatus, G'Uhaughn. Ann. S,- Mag. N. H. (5) iy. 1879, 

 p. 303, and Proc. Zool. i>oc. 1881, p. 243. 



Upper head-scales large, smooth or feebly striated ; nostril per- 

 fectly lateral ; nasal usually separated from the rostral ; supra- 

 orbitals in contact ; supraoculars three or four large transyerse, 

 separated from the supraorbitals by a series of small scales ; a smaller 

 anterior and a larger posterior parietal on each side, separated by 

 three shields, viz. a pair of interparietals and an occipital ; supra- 

 temporal edge with two projecting scales. Sides of neck not folded, 

 covered with sharply pointed, imbricate, keeled scales. Dorsal crest 

 a low serrated ridge ; a weaker lateral crest on each side of the 

 back. Dorsal scales keeled only on their posterior half; lateral 

 scales similar ; vcntrals a little larger, strongly keeled, ending in a 

 long sharp point ; thirty-three to forty-one scales round the middle 

 of the body. The adpressed hind limb reaches the anterior border 

 of the orbit. Tail very long, compressed, with serrated upper edge. 

 Bronzed green or brown above, with more or less distinct angular 

 darker cross lines on the back and vertical bars on the sides ; lower 

 surfaces green or bronzy, belly sometimes pinkish ; the male s throat 

 black. 



10. Liocephalus iridescens, 



Liocephalus iridescens, Gimth. Proc. Zool. Soc. 1859, p. 409, pi, xx. 

 fig. B; Cope, Proc. Ac. Philad. 1808, p. li^. 



Upper head-scales large, smooth ; nostril superior ; nasal sepa- 

 rated from the rostral ; supraorbitals in contact ; four or five large 

 transverse supraoculars, usiuiUy separated from the supraorbitals by 

 a series of small scales ; a smaller anterior and a larger posterior 

 parietal on each side ; an interparietal and an occipital, separated 

 by a pair of larger shields. Sides of neck not folded, covered with 

 sharply pointed, imbricate, keeled scales. Dorsal crest low. Dorsal 

 scales not very strongly keeled ; lateral scales scarcely smaller ; 

 vcntrals a little larger, pointed, smooth, or feebly keeled ; thirty- 

 seven to forty-tliree scales round tlie middle of the body. The 

 adpressed hind limb reaches the eye or tlie anterior border of the 

 orbit. Tail strongly compressed, crested like the back. Bronzy 



