136 IGUANIDE. 
7. Stenocercus mestus. (Prare IX. fig. 2.) 
No pterygoid teeth. Anterior border of ear denticulated. A series 
of broad supraoculars; occipital very small; temporal scales ob- 
tusely keeled. Scales on the sides of the neck strongly keeled and 
a little larger than those on the temples; a slight longitudinal fold 
behind the ear, and a small granular pit in front of the antehumeral 
fold; latter short, and with a denticulation formed by three or four 
large scales. Body subquadrangular. No dorsal denticulation. 
Dorsal scales large, rhomboidal, strongly imbricate, sharply keeled, 
not mucronate; the keels forming continuous straight lines ; lateral 
scales a little smaller and less strongly keeled. Gular and ventral 
scales smaller than dorsals, rhomboidal, imbricate, smooth. The 
adpressed hind limb reaches the eye; toes very long, fifth not ex- 
tending as far as second. Tail rounded, long, with rings of scales 
similar to, and not longer than, the dorsals. Dark olive above, spotted 
all over with whitish ; supraciliary edge, and a streak from below 
the eye to above the ear, whitish; lower surfaces greenish white. 
Total length .......... 154 millim. 
Head: si c2e ee ed excuses 15. ,, 
Width of head ........ lo. ,, 
Body: csg 2 bay dems 82 os 42 ,, 
Fore limb ............ 26 |x, 
Hind limb ............ 45° 5 
Tail (reproduced, bifid).. 97  ,, 
Peru. 
a od. Lima. J. M. Cowper, Esq. [P.]. 
22, CTENOBLEPHARIS. 
Ctenoblepharys, Tschudi, Faun. Per., Rept. p. 36. 
Tympanum distinct. Body depressed ; no dorsal crest. Dorsal 
scales smooth, flat, juxtaposed. Upper head-scales small. A 
curved fold in front of each shoulder, not extending across the 
throat. Digits subcylindrical, with smooth lamelle inferiorly. 
No femoral pores. Male with anal pores. Tail short, conical. 
Lateral teeth tricuspid; pterygoid teeth present. No sternal fon- 
tanelle. No abdominal ribs. 
Peru. 
1. Ctenoblepharis adspersus. 
Ctenoblepharys adspersa, Tschudi, l. c. pl. i. fig. 2. 
Snout short, subtriangular; canthus rostralis indistinct, nostril 
superior; edge of eyelids fringed; ear-opening moderately large, 
without denticulation. Upper head-scales small, subequal, smooth. 
Dorsal scales transversely suboval, with small granules in the 
intervals between them ; scales on the lower surfaces slightly larger, 
