24. LioL^MUs, 147 



or three anal pores. Tail about once and a half as long as head 

 and body ; caudal scales as large as dorsals. Greyish olive above, 

 spotted with dark brown, and with or without a black vertebral 

 line, or dark olive with small pale greenish spots or dots ; lower 

 surfaces greyish, mottled with blackish, or blackish. 



Total length 175 millim. 



Head 16 ,, 



Width of head 12 „ 



Body 54 „ 



Fore limb 25 „ 



Hind lirab 40 



Tail 105 „ 



Chili ; Patagonia. 



a. Hgr. Port Desire. C. Darwin, Esq. [P.]. (Tj^je.) 



b-c. S • Chili. (Types of L. lineatus.) 



d. $. Chili. (Tvpe of i. 5e//n.) 



e. $. Chili. 



10. Liolsemus nigromaculatus. 



Leiolsemus nigromaculatus, Gray, Cat. p. 213. 



inconspicuas, Gray, I. c. 



Tropidurus nigromaculatus, Wieym. Nova Acta Ac. Leop.-Carol. xvii. 



1835, i. p. 229. 

 ? Tropidurus oxj^cephalus, Wieym. I. c. p. 232. 

 Proctotretus uigromaculatus, Dam. i)- L'ibr. iv. p. 281 ; Bell, Zool. 



Beayle, Rept. p. 10, pi. iv. fig. 2 ; Guichen. in Gay, Hist. Chile, 



Rfipt. Y>- 34; Dam. Voy. Venus, Zool. p. 293, pi. iii. tig. 1. 

 Liolfemus oxyceplialus, Gravcnh. Nova Acta Ac. Leop.-Carol. xviii. 



1838, ii. p.735, pL liv. fig. 13. 



coiispersus, Gravenh. I. c. p. 737, fig. 14. 



Ptychodeira uigromaculata, Fitziny. Syst. Rept. p. 73. 

 Rhytidodeira iiigromaculata, Girard, Proc. Ac. Philad. 18-57, p. 193, 



and U.S. Explor. Exped., Herp. p. 353. 



oxycephala, Girard, II. cc. pi. xxviii. figs. 26-33. 



Proctotretus pallidus, Philippi, Rcise Atacaina, p. 166, pi. vi. fig. 3. 

 bisiguatus, Vhilippi, I. c. fig. 2. 



Nostril lateral. Upper head-scales rather large, smooth ; a small 

 azygos frontal, separated from the interparietal by a pair of fronto- 

 parietals ; interparietal smaller than, or nearly as large as, parietals ; 

 a series of three or four broad supraoculars ; a single series of scales 

 between the labials and the infraorbital ; temporal scales smooth or 

 very feebly keeled; three or four large, pointed scales projecting in 

 front of the ear, largest and nearly covering the latter in the full- 

 grown male. Sides of neck covered with very small scales, which 

 are lanceolate and somewhat raised on the longitudinal fold ; an 

 indistinct cur\X'd anteliumeral fold. Dorsal scales moderate, rhom- 

 boidal, strongly keeled, pointed ; ventral scales smaller, rounded 

 or obtusely pointed, smooth ; forty-eight to fifty-four scales round 

 the middle of the bod}-. The .'ulpressed hind limb roaches 



l2 



