196 REPTILES. 



** Scales of back and belli/ keeled^ of sides smaller, granular. 



The Two-streaked Enyalius. Enyalius bilineatus, Dum. 

 et Bib. E. G. iv. 234. 



Scales of the back and helly keeled, of the sides much smaller, 

 of the supraocular region placed in 6 or 7 longitudinal series ; 

 brown, with a while ray on each side of the back. 



Inhab. Brazils. Mus. Paris, I specimen. 



21. Opiiryoessa, Boie. Uraniscodon, part, Kaup. 

 Xiphosurus, part, Gray 



Head short, it and the eyebrows covered with small nearly equal 

 keeled polygonal plates. Interparietal plate small, surrounded 

 with rather more convex ones. Nostrils lateral, anterior. Skin 

 of throat with a slight longitudinal, and of chest with a distinct 

 transverse fold. Palate toothed. Body compressed. Scales 

 keeled, of the back small, of the belly larger. Back and tail with a 

 toothed crest of low compressed scales, covered with keeled rhombic 

 rather truncated scales. Femoral pores none. Toes slender, with 

 keeled acute-tipped cross shields beneath, and with rhombic keeled 

 scales above, the outer edge of the hinder ones slightly fringed 

 and regularly serrated, the outer hind toe quite free at the base. 

 Tail compressed. 



The Eyebrowed Ophryoessa. Ophryoessa superciliosa, Boie, 

 Isis. Guerin, Icon. Rept. t. 8,/. 1. Grai/, Griffith, A. K. ix. 40. 

 Dum. et Bib. E. G. iv. 238. Lacerta superciliosa, Linn. Mus. 

 Ad. 41. S. N. i. Seba, i. t. 93,/. 1. t. 96,/. 6. t. 109,/. 4. ii. t. 

 14, f. 4. Daud. R. iii. 336. KuM, Beytr. 105. Lophyrus xiphos- 

 urus, Spix, Braz. t. 10. L. aureonitens, Spix, Braz. \'2,t. 13 a, 

 very young. 



Brown ; occiput with a cross band of 6 rather larger angular 

 conical scales, the two middle largest. 



a. Adult, in spirits. America. 



" Lac. superciliosa,'' Shaw. 



b. Adult, in spirits. " Alabama, Mr. Mac Williams." Presented 



by Thomas Bell, Esq. 



C. Toes dilated under the last joint but one. Throat-pouch dis- 

 tinct, largely dilatable. Back often crested. Femoral pores 

 none. Nostril superior, subapical. Anoliina. 



22. Chamjsleolis, Cocteau. Anolis, part, Dum. et Bib. 



Toes elongate, the last joint but one much dilated. Scales of 

 the back and sides flat and smooth, circular and unequal in size, 

 of the belly very minute and granular. Tail compressed, subden- 



