216 IGUANIDE. 
10. Uta irregularis. 
Phymatolepis (Uta) irregularis, Fischer, Abh, Nat. Ver. Brem. vii. 
1882, p. 232, pl. xvii. figs. 1-4, 
Frontal undivided, separated from the occipital by the pair of 
frontoparietals ; no denticulation on the anterior border of the ear. 
Dorsal scales granular, with a narrow band 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, Wregm. Isis, 1828, p. 869, and Herp. Mex. p. 48; 
Fitzing. Syst. Rept. p. 75; Bocourt, Mass. Sc. Mex., Rept. p. 167. 
Tropidolepis, Cav. R.A. 2nd ed. ii. p. 88; Dum. § Bibr. iv. p. 294; 
Fitzing. lc. p. 76; Gray, Cat. Liz. p. 208. 
Tropidurus, part., Wagler, Syst. Amph. p. 146. 
Tympanum distinct. Body depressed; no dorsal crest ; dorsal 
scales imbricate, keeled, equal. Upper head-seales enlarged, occi- 
pital very large. No gular fold; no gular pouch. Digits with keeled 
lamellie 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. 
I. 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. 
* Sceloporus marmoralus, Hallow. Proc. Ac. Philad. 1852, p. 178, and 
in Sitgr. Exped. Zuni & Color. Riv. p. 110, pl. ii. 8. delicatissimus, 
Hallow. U1. cc. pp. 178, 109, pl. i. 
Texas. 
