158 IGUANIDE. 
with very long falciform claws, are very feebly keeled inferiorly, and 
the fourth toe is fringed laterally. Eight to ten anal pores. Tail 
depressed, as long as or slightly longer than head and body ; caudal 
scales much larger than dorsals. Grey above, with numerous small 
black spots, some of which are bordered with white ; lower surfaces 
white, uniform or spotted with blackish. 
Total length .......... 136 millim. 
PLCS 6 apache Sees ae 16, 
Width of head ........ 13 —Ci«,, 
Body sec oa kegel waa 2 52g, 
Fore limb ............ DO x8 
Hind Viti ji. eae as 39°C, 
MBAS conga arate teats 68, 
Chili; Northern Patagonia. 
a-b. 3 & yg. Bahia Blanca. C. Darwii, Esq. [P.]. 
These specimens differ from Bibron’s description in having two 
or three instead of four series of scales between the labials and the 
infraorbital ; also in having a patch of large scales on the hind side 
of the thighs. Should they be regarded as a distinct species, they 
must bear the name L. beaglit, Girard. 
25. SACCODEIRA. 
Proctotretus, part., Dum. § Bibr. iv. p. 266; Fitzing. Syst. Rept. 
74. 
Pca cc (non Fitz.) Gray, Cat. Liz. p. 216. 
Saccodeira, Girard, Proc, Ac, Philad. 1857, p. 197, and U.S, Explor. 
Exped., Herp. p. 322. 
Proctotretus, Gerard, l. c. p. 329. 
Tropidocephalus, #. Miiller, Verh. Nat. Ges. Basel, vii, 1882, p. 160. 
Tympanum distinct. Body slightly depressed. Dorsal scales 
imbricate, keeled, the vertebral series simulating a low crest. Upper 
head-scales small, keeled. No transverse gular fold. Digits sub- 
cylindrical or compressed, with keeled lamelle inferiorly. No 
femoral or anal pores. Tail subcylindrical; caudal scales not verti- 
cillate. Lateral teeth tricuspid; pterygoid teeth. A small sternal 
fontanelle. No abdominal ribs. 
South America. 
Synopsis of the Species. 
Upper head-scales multicarinate; ventral 
SCaleS STHOODH sist aisi-s, wp ea aan aera saw elees 1. ornatissima, p. 159. 
Upper head-scales unicarinate; ventral 
scales smooth ........ 0.0.0... 00005, 2. pectinata, p. 159. 
Upper head-scales unicarinate; ventral 
scales keeled: 25 cactice sian emai eee 4 3. azurea, p. 160. 
