8. CEEATOPHOKA. — 9. HAEPESAUBITS. 279 



deeply concave; occiput with a pair of low ridges, convergent 

 anteriorly ; rostral appendage large in the male, cylindrical, pointed, 

 covered with small imbricate strongly keeled scales, absent or rudi- 

 mentary in the female ; ten to twelve upper and as many lower 

 labials. Gular scales smaller than ventrals, very strongly keeled. 

 No nuchal crest. Dorsal scales small, irregular, unequal, strongly 

 keeled ; ventral scales larger, very strongly keeled. Limbs above 

 with strongly keeled unequal scales ; digits very strongly keeled ; 

 fifth toe shorter than third ; the adpressed hind limb reaches be- 

 tween the shoulder and the orbit. Tail not compressed, covered 

 with subequal strongly keeled scales ; its length not more than 

 once a"d a half that of head and body. Brown, with lighter and 

 darker markings or longitudinal lines ; generally a rhombic mark 

 on the sacral region ; males with a large white spot or cross band on 

 the gular region. 



Total length 83 miUim. 



Head 11 „ 



Width of head 6-5 „ 



Body 26 



Fore limb 17 „ 



Hind limb 26 



Tail 46 



Ceylon. 



a-h. (S 2 ■ Ceylon. (Types.) 



o-f, g-l' c? , 2 , & yg. S. Ceylon. 



m-p, q-t. J , $ , & yg- Ceylon. 



u-z. c?,$, &ligr. Ceylon. G. H. K, Thwaites, Esq. [P.]. 



9. HARPESAUETJS. 



Arpephorus, (non Fischer de Waldh.) A. Dum. Cat. M4th. Mept. 

 p. 92. 



Tympanum distinct. Snout ending in a long compressed cuta- 

 neous appendage. Body and tail compressed, covered above with 

 equal smooth scales of moderate size. A dorsal crest. No gular 

 sac ; no transverse gular fold. No femoral or prseanal pores. 



Java. 



1. Harpesaurus tricinctus. 



Arpephorus tricinctus, A. Dum. I c. p. 93, and Rev. Mag. Zool. (2) 

 iii. 1851, p. 214, pi. vii., and Arch. Mus. viii. 1856, p. 371. 



E-ostral appendage longer than the head, formed of a compressed 

 falciform scale curved upwards, surrounded at the base by a few 

 large scales. Upper head-scales small, slightly tubercular ; a large 

 prominent triangular scale on the snout ; canthus rostralis forming 

 a serrated ridge. Gular scales tubercular. Dorsal crest a low 

 serrated ridge. Dorsal scales smooth, equal, forming regular trans- 

 verse series : ventral scales keeled. Scales on the limbs keeled. 



