LIZARDS. 229 



a. Young, in spirits. The hinder occipital spines longer, with a 



small one rather in front between them. California. Present- 

 ed by Professor De Blainville. 

 P. Blainvillii, Gray, l. c. 



b, c. Young, in spirits, like a. California. Presented by Capt. 



Sir Edw. Belcher, C.B., R.N. 

 d. Adult, in spirits. The spines on the occiput forming a conti- 

 nued frill. California. 

 P. solans, Gmi/, B. M. 



**** Head spinose. Back and belli/ icith a series of lateral spines. 

 Scales of the belli/ keeled. Femoral pores indistinct, separated 

 by a wide preanal space. 



The Texian Tapayaxin. Phrynosoma cornutum. Gray, A. K. 

 ix. 45, t, P. Harlani, Weigm. H. M. 54. Dum. et Bib. E. G. 

 iv. 314. P. BufFonium, Weigm. Ms, 1828, 367. H. Mex. 54. 

 Agama cornuta, Harlan, J. A. N. S. Phil. iv. 299, t. 20, w. 14. 

 Guv. R. A. ii. 37. Tapayaxin, Barton, Med. Phys. Journ. viii. 

 Four-horned Agama, Fennell, Mirror, 1837, 121,/. 



Lower jaw with a series of triangular keeled scales, separated 

 from the keeled lower labial shields by some scales behind ; chin 

 with a diverging series of rather larger compressed spines on each 

 side ; ventral scales keeled ; back with scattered elongated conical 

 angular spines, surrounded at their base with smaller similar 

 spines ; 2 middle occipital spines elongate, rather compressed ; 

 femoral pores distinct, without any on the preanal space ; belly 

 edged with a series of slender spines on each side ; head-shields 

 convex ; lower part of temple with a series of compressed spines ; 

 occiput with 2 elongated spines. 



a. Half grown, in spirits. Arakansas, N. America. Presented by 



Dr. Macauley. 

 d, e. Adult and half gi'own, in spirits. Texas. From Mr. Drum- 



mond's collection. 

 /. Adult, in spirits. Texas. Presented by Edward Cross, Esq. 

 g. Half-grown, stuffed. Mexico. 



