LIZARDS. 183 



cross shields beneath, not fringed nor toothed on the sides. Body 

 compressed. Scales small, rather imbricated and keeled, of the 

 sides smaller, smoother, oblong. Back and tail not crested. Tail 

 slender, elongate, tapering, covered with regular lozenge-shaped 

 keeled scales, the keels forming slight ridges. 



The Camaleao. Polychrus marmoratus, Cuv. R. A. Merreyn^ 

 Tent. 48. Spix, Braz. 14, t. 14. Guerin, Icon. t. 11,/. 3. Nieuw. 

 Ahhild. t. Weigm. H. Mex. 16. Schinz, Rept. t. 28,/. 1. Dum. 

 €t Bib. E. G. \\. 65. Lacerta marmorata, Linn. S. N. 368. Shaw, 

 Zool. iii. 224. Lacep. Q. O. i. 394, t. 26. Daud. Rept. iii. 433. P. 

 fasciatus, De Laporte, Bull. Sci. Nat. ix. 110. P.virescens, Wag- 

 ler, Si/s. 149. Icon. t. 12, /.I. P. strigiventris, Wagler, Icon. t. 

 12,/ 2. Agama variegata, Guilding, MSS. 



Brown, often with bro^vn-edged fulvous bands and brown di- 

 verging lines; scales of the back nearly equal, those of the middle 

 of the back rather larger than those on the sides of the back ; the 

 head-shields rather larger in front ; claws pale, with a black back 

 and margin. 



a, b. In spirits. Brazil. 



c. In spirits. Iridescent purplish. Brazil. 



d. In spirits. Larger. 



€. In spirits. W. Indies. From the Kev. L. Guilding's collec- 

 tion. 



/. In spirits. Brazil. Presented by Lord Stuart. 



g. In spirits. Like/. 



2. Sph^rops. Polychrus, part, Weigm., Dum. et Bib. 



Head 4-sided, short, shelving in front, covered with numerous 

 nearly regular many-sided shields, those of the face largest. Eye 

 very prominent, globose. Eyelid granular, with a very small 

 transverse opening. Throat with a small dewlap, covered with 

 oblique series of square scales, toothed in front. Nostril lateral, 

 far back, about one third from the end of the nose. Body com- 

 pressed. Scales of the back small, keeled, of the sides larger, ob- 

 long, in oblique series, smooth. Back and tail not crested. The 

 limbs slender. Toes slender, moderate, the third and fourth near- 

 ly equal, convex and covered with a series of cross plates beneath, 

 not fringed on the sides. Femoral pores none. Tail slender, 

 elongate, tapering, covered with rather rhombic keeled scales. 



The eye of this genus nearly resembles that of the chameleon, 

 and it also changes colour with equal facility. Weigmaun refers it 

 to Polychrus, as if it had femoral pores ; but our specimens, which 

 agree in every other respect, have them not. 



r2 



