184 IGUANIDE. 
a-c. 3, 9,& yg. Canelos, Ecuador. Mr. Buckley fe . 
dé. Sarayacu, Ecuador. Mr. Buckley [C. ]. 
e 3. Peruvian Amazons, Mr. E. Bartlett [C.]. 
3. Urocentron castor. 
Doryphorus castor, Cope, Proc. Am. Phil. Soc. xi. 1870, p. 556. 
Apparently very closely related to the preceding. Nostril between 
two scales. Scales of the sides scarcely smaller than dorsals and 
ventrals, Tail wider than the body. Colour blackish olive, gradu- 
ally lighter to the head, which is thickly black-spotted on a green 
ground; a broad crescentic black collar, which is broadly light-mar- 
gined behind, much more indistinctly before; the posterior border 
is again broadly margined with black behind ; limbs closely green, 
spotted on a blackish ground; tail uniform brown ; belly black, on 
the sides dark green, femora black. 
Length to vent 60 millim.; tai] 33 millim. 
Pebas, Ecuador. 
31. PHYMATURUS. 
Phymaturus, Gravenh. Nova Acta Ac. Leop.-Carol. xviii. 1888, ii. 
p. 749; Gray, Cat. Lz, p. 226. 
ae Bell, Zool. Beagle, Rept. p. 25; A. Dum. Arch. Mus. viii. 
p. 556, 
Tympanum distinct. Body depressed; no dorsal crest; dorsal 
scales small, juxtaposed or subimbricate, uniform. Upper head- 
scales small. A transverse gular fold; no gular pouch. Digits 
slightly compressed, with keeled lamelle inferiorly. No femoral 
pores ; males with a series of pores on the front edge of the vent. 
Tail rather short, subcylindrical, with whorls of spinose scales. All 
the teeth trilobate; pterygoid teeth. A sternal fontanelle. No 
abdominal ribs. 
Chili. 
1, Phymaturus palluma. 
Phymaturus palluma, Gray, Cat. p. 226. 
mee palluma, Molina, Saggio sulla Storia nat. del Chile, 1810, 
Stellio palluma, Daud. Rept. iv. p. 46. 
Phymaturus palluma, Gravenh. 1. c. p. 750, pl. lv. fig. 2. 
Centrura flagellifer, Bell, 1. c¢. pl. xiv. fig. 2; A. Dum. lc. p. 557 
pl. xxii. fig. 5. : 
Oplurus bibronii, Guichen. in Gay, Hist. Chile, Rept. p. 58, pl. iii. 
fig. 2; A. Dum. Cat. Méth. Rept. p. 84. 
Head small, snout short; canthus rostralis indistinct, nostril 
superior ; ear-opening moderately large. Head-scales small, equal, 
subconical on the temples. Throat and sides of neck strongly 
plicate. Body much depressed. Dorsal scales very small, granular, 
