1852.] 69 



Cnemidophorus TIGRIS, B. and G. Scales on the subguttural fold small in size; 

 four yellowish indistinct stripes along the dorsal region. From the Valley of 

 the great Salt Lake. Collected by Cupt. Stansbury. 



Crotaphytits Wislizenii, B. and G. Head proportionally narrow and elong- 

 ated ; cephalic plates and scales on the back very small ; yellowish brown, spot- 

 ted all over with small patches of deeper brown or black. Caught near Santa 

 Fe, by Dr. Wislizenius ; specimens of the same species sent in by Lieut. Col. 

 J. D. Graham, collected between San Antonio and El Paso del Norte. 



L/TA (nov. gen.) B. and G. Upper part of body covered with small scales ; a 

 pectoral fold of the skin ; auditory apertures ; femoral pores present, whilst anal 

 pores are wanting. 



Uta Stansburiana, B. and G. Tail slender, elongated and conical, provided 

 with large scales disposed in verticils ; a subgular fold in advance of the pecto- 

 ral one. From the valley of the great Salt Lake ; brought home by Capt. Stans- 

 bury. ' 



ScELOPORus graciosus, B. and G. Head subconical ; scales of the back 

 larger than in any other part of the body ; tail of medium size, slender and 

 conical. From the valley of the great Salt Lake. 



Elgaria sci.vcicauda, B. and G. This is the Tropidohpis scincicaudus of Mr. 

 Skilton as published in Silliman's Journal vii. 1S49, 202. The specimen there 

 described and figured is immature. From full-grown individuals we have 

 drawn the following characters : Dusky green above, light ash colored below. 

 Eleven transverse black bands on the back interrupted on the dorsal line, white 

 dotted on their posterior margin. There are six or more of these bands on the 

 tail. Thirteen to fourteen rows of scales, all of which well carinated. This 

 species inhabits Oregon and California. 



Plestiodon SKILTONIA^^u3I,B. and G. Head small, continuous wdth the body ; 

 tail stout, very long and subquadrangular. Olivaceous brown, with one broad 

 band of black on each side. Inhabit Oregon in company with the preceding. 

 Collected by Rev. George Geary. 



Phrynosoma PLATYRHiNos, G. Suout truucatcd, flattened, concave ; nostrils 

 situated within the internal margin of the superciliary ridge ; occipital and tem- 

 poral spines of middle size ; one row of pyramido-horizontal and abdomino- 

 peripheric scales, smaller than in Fhr. Douglassii. Lower surface of head 

 covered with small and nearly uniform scales ; on the sides and near the neck 

 a series appears a little more conspicuous, slightly raised and acute. Infra- 

 marginal series of plates large, of stout appearance, sharp and acute, above 

 which two row^s of small plates are seen lining the margin of the lower jaw. 

 Scales of the body of middle size. Femoral pores very conspicuous, but more 

 apart than in Phr. Douglassii. The lower surface of the body is unicolor. 

 From Great Salt Lake ; collected by Capt. Stansbury's party. 



Phrynosoma modestum, G. Snout truncated, flattened, but not concave. 

 Nostril openings situated within the internal margin of the superciliary ridge. 

 Occipital and temporal spines but little developed. No pyramido-horizontal 

 scales at the periphery of the abdomen. Lower surface of head covered with 

 minute, generally uniform, scales. Row of inframarginal plates resembling 

 that in Fhr. platyrhinos, above which, however, one single series of smaller 

 plates is observed, lining the margin of the lower jaw. Scales on the belly pro- 

 portionally larger than in any other species, smooth, subquadrangular or trape- 

 zoidal. Femoral pores conspicuous, the series from right and left meeting on 

 the middle line of the belly and forming a curve, the convexity of which is 

 turned backwards towards the vent ; the lower surface of the body is unicolor. 

 Brought from the valley of the Rio Grande west of San Antonio, by Gen. 

 Churchill, and from betw^een San Antonio and El Paso del Norte, by Lieut. 

 Col. J. D. Graham. 



