160 
IGUANIDSE. 
Total length .......... 170 millim. 
CAE esca.% caval boise vag scape 18 
Width of head ........ 15, 
Body ypeces even owners 62 4s 
Fore limb... cae 294g 
Hind limb............ 46, 
EL Aik, se sete. os lelacn dems aries 90a, 
Chili; Patagonia; Argentine Republic. 
a-c. 
a. 3 
e-g. 3 & yg. 
Patagonia, 
High Pampas of 8. Luis, 
Mendoza. 
18 miles off Cape 8, Antonio, 
Buenos Ayres. 
3. Saccodeira azurea. 
C. Darwin, Esq. [P.]. 
E. W. White, Esq. [C.]. 
E. Gibson, Esq. [P.]. 
Tropidocephalus azureus, Miiller, Verh, Nat. Ges. Basel, vii. 1882, 
p. 160, pl. —, and 1885, p. 710. 
Liolemus azureus, Bouleng. Ann. § Mag. N. H. (5) xv. 1885, p. 192. 
Very closely allied to the preceding species, with which it agrees 
entirely in coloration ; differing in the following characters :—Gular 
and ventral scales keeled, ending in a short spine. The adpressed 
hind limb reaches the ear. 
nearly equal. 
Digits longer ; third and fourth fingers 
Tail longer, about once and two thirds as long as 
head and body. 
Total length .......... 205 millim. 
Wead neva ssn aes ur 1745 
Width of head ........ 14. C4, 
BOO ois Guirieth aida uopucaecne 58, 
Fore limb ............ SL 4, 
Hind limb............ 53, 
i 0 Enea eee ee ene 130 —,, 
Uruguay; Southern Brazil. 
aod. 
6. 9. 
Dept. of Soriano, Uruguay. 
Rio Grande do Sul. 
26. LIOCEPHALUS *. 
— Havers, Esq. [P.]. 
Dr. EH. v. Thering [C.]. 
Tropidurus, part., Fvtzing. N. Classif. Rept. p. 17. 
Be es a Gray, Phil. Mag. (2) ii. 1827, p. 207; Fitzing. Syst. 
p. 70. 
Holotropis, Dum. & Bibr. iv. p. 259. 
Steironotus, Mitzing. 1. c. 
Leiocephalus, part., Gray, Cat. Liz. p. 217. 
* 1. Letocephalus microlepis, Gray, Cat. p. 274.—Specimen missing. 
2. Scelotrema formosum, Tschudi, Faun. Per., Herp. p. 27, pl. i. fig. 1L.— 
Peru. : a 
3. Scelotrema crassicaudatum, id. 1. c.—Peru, 
