156 IGXTANID^E. 



20. Liolaemiis wiegmanni. 



Leiolfemus ■wiegmaimii, Gray, Cat. p. 216. 

 Proctotretus wiegmannii, Dum. 4'- Bibr. iv. p. 284 ; Bell, Zool. Beagle, 



Mept. p. 15, pi. viii. figs. 1, 2 ; Guichen. in Gay, Hist. Chile, Rept. 



p. .36 ; Dum. Voy. Venus, Zool. p. 29o, pi. iii. tig. 2, 

 Ptj'cbodeira wiegmanni, Fitziny. >Syst. Bept. p. 73. 

 Rhytidodeira wiegmanni, Girard, Proc. Ac. Fhilacl. 1857, p. 198, and 



U.S. Explor. E.iped., Hevp. p. 352. 

 Ortholasmus fitzroii, Girard, I. c., and U.S. Explor. Exp. p. 373. 



Nostril sublateral. Upper head-scales very small, striated or 

 feebly keeled in the adult; no frontal; interparietal and parietals 

 subeqnal ; a series of four to six enlarged supraoculars ; two series 

 of scales between the labials and the infraorbital ; temporal scales 

 keeled ; anterior border of ear not denticulated. Sides of neck gra- 

 nular, strongly plicate. Dorsal scales moderate, rhomboidal, strongly 

 keeled, the keels forming continuous lines ; lateral scales much 

 smaller, imbricate, keeled ; ventrals smaller than dorsals, roundish, 

 smooth ; forty-six to fifty-four scales round the middle of the body. 

 The adpresscd hind limb reaches the axil in the female, a little 

 beyond the shoulder in the male ; hinder side of thighs with a patch 

 of enlarged rhomboidal keeled scales. Anal pores present in both 

 sexes, five to eight in the male, three to eight in the female. Tail a 

 little longer than head and body ; caudal scales not larger than 

 dorsals. Pale grey or greyish olive above, with two or four series of 

 transverse, white-edged dark spots, separated by longitudinal light 

 lines ; lower surfaces white. 



Total length 135 millim. 



Head 15 „ 



Width of head 12 „ 



Body 44 „ 



»i 

 j> 



»5 



Fore limb 22 



Hind limb 34 



Tail 76 



• Chili and North Patagonia to Uruguay. 



a-d. (S , hgr., & yg. Maldonado. C. Darwin, Esq. [P.]. 



e. <3- Chili. 



f-i. d"$. Bahia Blanca. C. Darwin, Esq. [P.]. 



k-l. J & ligr- Uruguay. 



m. Hgr. Peru (?). J. E. Gray, Esq. [P.]. 



n-o. c? . ? 



21. Liolsemus occipitalis. (Plate X. fig. 3.) 



Liolsemus occipitalis, Bouleng. Ann. ^- Mag. N. H. (5) xv. 1885, 

 p. 192. 



Nostril superior. Upper head-scales very small, convex, smooth ; 

 no frontal ; interparietal larger than the surrounding scales, as large 

 as or larger than the tympanum ; a series of three or four enlarged 

 supraoculars ; two series of scales between the labials and the infra- 



