21 6 IGUANID^. 



10. Uta irregularis. 



Pliymatolepis (Uta) irregularis, Fischer, Ahh, Nat. Vet: Brem. vii. 

 1882, p. 232, pi. xvii. tigs. 1-4. 



Frontal undivided, separated from the occipital by the pair of 

 frontoparietals ; no deuticulation on the anterior border of the ear. 

 Dorsal scales granular, with a narrow baud of irregular enlarged 

 keeled scales on the vertebral line ; a few scattered enlarged scales 

 on the sides ; a series of erect pointed scales on each side of the neck 

 and another on the hinder part of the back to above the hind limbs. 

 The adpressed hind limb reaches the axilla. Ten femoral pores on 

 each side. Greenish-grey above, lighter inferiorly ; the nuchal and 

 dorsal ridges, a cross-line between the shoulders, and three narrow 

 cross-bands on the back, black ; throat yellowish grey, dotted and 

 marbled with black ; belly light grey. From snout to vent 95 

 millim, 



Mexico. 



49. SCELOPORUS.* 



Sceloporus, Wie(/m. Ists, 1828, p. 369, and Hei-p. Mex. p. 48 ; 



Fifzhuj. Syst. liept. p. 75 ; Bvcourt, Miss. Sc. Mex., Rept. p. 167. 

 Tropidolepis, Cuv. R.A. 2ud ed. ii. p. 38; Dum. 4'- Bihr. iv. p. 294; 



FitziiKj. I. c. p. 76 ; Gray, Cat. Liz. p. 208. 

 Tropidm-us, part., Wagler, Syst. Amph. p. 146. 



Tympanum distinct. Bodj- depressed ; no dorsal crest ; dorsal 

 scales imbricate, keeled, equal. Uj^per head-scales enlarged, occi- 

 pital very large. No gular fold; no gular pouch. Digits with keeled 

 lamellae inferiorly. Femoral pores. Tail moderate or long, cylin- 

 drical or compressed. Lateral teeth tricuspid ; no pterygoid teeth. 

 A sternal fontanelle. No abdominal ribs. 



North and Central America. 



Synopsis of the Species. 



Lateral scales as large as or a little smaller than, and passing 

 gradually into, the dorsals. 



A. Lateral scales directed obliquely upwards and backwards ; the 

 series of femoral pores not meeting medially. 



1. The distance between the base of the fifth toe and the 

 extremity of the fourth less than that between the nostril 

 and the arm. 



* ^celu-jMriis onarriioraius. Hallow. Proc. Ac. Philad. 1852, p. 178, and 

 in Sitgr. Exped. Zimi & Color. Kiv. p. 110, pi. ii. S. ddkatis&imus, 

 Hallow. U. a: pp. 178, 109, pi. i. 

 Texas. 



