146 IGUANIDE, 
Nostril lateral. Upper head-scales rather small, striated ; inter- 
orbital scales in oneor two rows; interparietal small; parietals usually 
indistinct, if distinct larger than interparietal ; a series of four or five 
enlarged supracculars; a single series of scales between the labials 
and the infraorbitals; temporal scales feebly keeled; one or two 
small scales project very slightly on the anterior border of the ear. 
Sides of neck covered with very small scales, with a strong longi- 
tudinal fold bifurcating towards the ear; a curved antehumeral 
fold. Dorsal scales large, rhomboidal, strongly keeled, ending in a 
sharp point or mucro; ventral scales a little smaller, rounded, 
smooth; forty scales round the middle of the body. The adpressed 
hind limb reaches the axil in the female, the ear or slightly beyond 
in the male; hinder side of thighs uniformly granulate. Male with 
two anal pores. Tail once and a half to twice as long as head and 
body ; caudal scales nearly as large as dorsals. Olive or coppcery 
brown above, with afew small blackish spots, and a light latero- 
dorsal band; lower surfaces with strong metallic gloss, the throat 
and breast greenish or blue-green. 
Total length ......... 142 millim. 
Ca ates sath eada atetiest LBD Sy 
.Width of head ........ LR) pe: 
BONG jocisscr esgcaencigdtaent oe 42, 
Fore limb ............ 25. 
Hind limb............ 40, 
Tail. sikcencieee eases a 85, 
Chih. 
a @. Valparaiso. C. Darwin, Esq. [P.]. 
b-c. ¢ & her. Valdivia. C. Darwin, Esq. tpt 
9. Liolemus bibronii. 
Leioleemus bellii, Gray, Cat. p. 212. 
bibronii, zd. 0. ¢. 
——- lineatus, zd. 7. e. p. 213. 
Proctotretus bibronii, Bell, Zool. Beagle, Rept. p. 6, pl. ui. fig. 1. 
Rhytidodeira bibroni, Girard, Proc. Ae. Philad. 1857, p. 198, and 
U.S. Expl. Exped., Herp. p. 352. 
Nostril lateral. Upper head-scales rather small, smooth ; a small 
azygos frontal, separated from the interparietal by a pair of fronto- 
parietals ; interparietal as large as, or a little smaller than, the 
parietals: a series of three enlarged supraoculars ; a single series of 
scales between the labials and the infraorbital; temporal scales 
indistinctly keeled; ear-opening with a very indistinct denticulation 
in front. Sides of neck covered with very small scales, with an 
irregular longitudinal fold; a curved antchumeral fold. Dorsal 
scales moderate, rhomboidal, strongly keeled, ending in a sharp 
point; ventral scales nearly as large, but rounded and smooth ; fifty 
to fifty-eight scales round the middle of the body. The adpressed hind 
limb reaches the axil in the female, in front of the shoulder in the 
male; hinder side of thighs uniformly granulate. Male with two 
