l-iO IGUANID^. 



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. jyictus, p. 151. 



Dorsal scales truncate or rounded pos- 

 teriorly, feebly keeled 16. tenuis, p. 152. 



/3. No azygos scale between the orbits. 



A single series of scales between the 



labials and the infraorbital 19. dariuinii, p. 155. 



Two series of scales between the labials 



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 scales small, hexagonal, scarcely 

 imbricate ; laterals smaller still, 

 juxtaposed 18. signifer, p. 151. 



b. Nostril superior. 



Interparietal at least as large as the 



tympanum 21. occipitalis, p. 156. 



Interparietal much smaller than the 



tympanum 22. multimaculatus, p. 157. 



1. Liolsemus nitidiis. 



Leiodera chilensis, Gray, Cat. p. 210. 

 Tropidurus chilensis, (nan Less.) Wieym. Nov. Acta Ac. Leop.-Carol. 



xvii. Io3o, i. p. 233. 



nitidus, Wiegm. I. c. p. 234, pi. xvii. fig. 2. 



olivaceus, Wieyyn. I. c. p. 268. 



Proctotretus chilensis, var. A, Dum. Sj- Bibr. iv. p. 269 ; Guichen. in 



Gay, Hist. Chile, Hept. p. 24 ; Dum. Voy. Venus, Zool. Rept. pi. i. 



Liotemus lineatus, Gravenh. Nov. Acta Ac. Leop.-Carol. xviii. 1838, 



ii. p. 723, pi. liv. figs. 1-7. 

 nitidus, Gravenh. I. c. p. 727, figs. 8-10 ; Girard, U.S. Explor. 



Exped., Herp. p. 334. 



luiicolor, Gravenh. I. c. p. 728. 



marmoratus, Gravenh. I. c. p. 729, pi. liv. fig. 11. 



Proctotretus chilensis, part., Bell, Zool. Beagle, Rept. p. 2, pi. ii. 



Liolaemus olivaceus, Fitzing. Syst. Rept. p. 74. 



Liodeira chilensis, part., Girard, I. c. p. 340. 



? Proctotretus marmoratus, Philippi, Reise Atacama, p. 165. 



