140 IGUANIDE. 
b. Lateral scales considerably smaller than dorsals. 
a. A small azygos frontal scale. 
Dorsal scales pointed posteriorly, 
strongly keeled ; two or three pointed 
scales project in front of the arm.. 12. lineomaculatus, p. 149. 
Dorsal scales pointed posteriorly, 
strongly keeled ; no projecting scales 
in front of the arm ............ 15. pictus, p. 151. 
Dorsal scales truncate or rounded pos- 
teriorly, feebly keeled .......... 16. tenuis, p. 152. 
B. No azygos scale between the orbits. 
A single series of scales between the 
labials and the infraorbital ...... 19. darwinii, p. 155. 
Two series of scales between thelabials 
and the infraorbitals .......... 20. wiegmanni, p. 156. 
2. Dorsal scales smaller than ventrals. 
a. Nostril latero-superior. 
Dorsal and lateral scales small, round- 
ish-hexagonal, imbricate ........ 17. multiformis, p. 153. 
Dorsal scalessmall, hexagonal, scarcely 
imbricate; laterals smaller still, 
juxtaposedss .cisc vases ews o a 18. signifer, p. 154. 
b. Nostril superior. 
Interparietal at least as large as the 
tyMpanum. 6.5 acai eae ene 21. occipitalis, p. 156. 
Interparietal much smaller than the 
CYMPANUM 523. ss ea eae Set 22. multimaculatus, p. 157. 
1. Liolemus nitidus. 
Leiodera chilensis, Gray, Caf. p. 210. 
Tropidurus chilensis, (non Less.) Wieym. Nov. Acta Ac. Leop.-Carol. 
xvii. 1835, i. p. 233. 
—— nitidus, Wiegm. 1. c. p. 284, pl. xvii. fig. 2. 
olivaceus, Wiegm. 1. c. p. 268. 
Proctotretus chilensis, var. A, Dum. § Bibr. iv. p. 269; Guichen. in 
Gay, Hist. Chile, Rept. p.24; Dum. Voy. Venus, Zool. Rept. pl. i. 
fig. 1. 
Like lineatus, Gravenh. Nov. Acta Ac. Leop.-Carol. xviii. 1838, 
ii. p. 723, pl. liv. figs. 1-7. 
—— nitidus, Gravenh. l. c. p. 727, figs. 8-10; Girard, US. Explor. 
Exped., Herp. p. 334. 
unicolor, Gravenh. Ll. ¢. p. 728. 
marmoratus, Gravenh. 1. c. p. 729, pl. liv. fig. 11. 
eee chilensis, part., Bell, Zool. Beagle, Rept. p. 2, pl. ii. 
Liolemus olivaceus, Fvtzing. Syst. Rept. p. 74. 
Liodeira chilensis, part., Girard, l. c. p. 340. 
? Proctotretus marmoratus, Philippi, Reise Atacama, p. 165. 
