170 



IGUANID^. 



rostral ; no large supraoculars ; ear-opening with a more or less dis- 

 tinct denticulation in front. Sides of neck not distinctly plicate, 

 covered with pointed, imbricate, keeled scales. Dorsal crest a low 

 serrated ridge. Dorsal scales small, not or but scarcely mucronate, 

 strongly keeled, the keels forming slightly oblique continuous lines ; 

 laterals and ventrals as large as dorsals ; latter rhomboidal, smooth ; 

 sixty-one to seventy-five scales round the middle of the body. 

 The ad^jressed hind limb reaches the shoulder or the ear. Tail 

 moderately compressed, with feebly serrated ridge. Olive- or 

 bronze-green, uniform or with lighter or darker spots ; lower 

 surfaces metallic, sometimes marbled with blackish : throat usually 

 green ; males usually with a black band across the throat, some- 

 times extending to the chest ; sometimes a small black spot on the 

 shoulder. 



Total length . . 



Head 



Width of head 

 Body 



Ecuador. 



a-h, c. c? ? • 



d,e,f.6 2- 



9- ?. 



h. S. 



i. Several specs. : c5' , 



$,&hgr. 

 k-l, m, n. (S 2' 



millim. 



, 250 



, 20 



16 



65 



millim. 



Fore limb 34 



Hind limb 57 



Tail 165 



Guayaquil. 

 W. Ecuador. 

 Sarayacu, Ecuador. 

 Colombia ? 



p 



Mr. Eraser [C.]. 

 Mr. Eraser [C.l. 

 Mr. Buckley [C.]. 



J. Brenchley, Esq. [P.]. 



16. Liocephalus tricristatus. 



Opbryoessoides tricristatus, A. Dum. Cat. Meth. Rept. p. 66, atul 

 Arch. Mus. viii. p. 531, pi. xxii. fig. 1. 



A strong supraciliary crest ; upper head-scales small, keeled ; 

 nostril lateral. Sides of neck not folded. Dorsal and ventral 

 scales large, keeled. Dorsal crest a low serrated ridge ; another 

 similar ridge on each side of the back. Tail feebly compressed. 

 Light brown above ; back with transverse, brown, yellow-edged 

 bands ; similar vertical bands on the sides. 



Head and body 60 millim. ; tail 100 millim. 



Brazil. 



17. Liocephalus dumerilii. 



Opbryoessoides dumerilii, Steindachn. Novara, Rept. p. 3.3, pi. ii. 

 fig. 5. 



Apparently allied to the preceding. The supraciliary crest ends 

 in a large pyramid-shaped tubercle ; temple with large tubercular 

 shields. Light yeUowish-brown above ; a series of triangular dark 

 reddish-brown sjtots on each side of the doi'sal line. 



Para. 



