24. argatra.—25, OREOSAURUS. 409 
broad on the back, shorter on the belly ; lateral scales smaller, sub- 
oval ; thirty to thirty-five scales round the middle of the body, thirty 
from occiput to sacrum inclusively, and twenty-seven or twenty-eight 
from collar fold to preeanal region. Preanal shields in two rows, 
four in the first, sixin thesecond. Limbs with large smooth shields; 
hinder side of thighs with small scales. Nine to twelve femoral 
pores on each side. Caudal scales elongate quadrangular, smooth, 
forming regular annuli, Olive-brown above, with or without 
reddish brown marblings; flanks with equidistant groups of cream- 
coloured spots; the sutures of the head-shields generally dark 
brown; lower surfaces yellowish. 
re millim. 
Total length................ 228 212 
ead) ecceth acs eieasn areata ayaa ae 25 19 
Width of head.............. 17 12 
From end of snout to fore limb. 388 29 
From end of snout to vent.... 93 82 
ore Timah: gi <i sso gh a Saas cautas eae 28 21 
Hind Wmb~ sacdece as hes avsuscqanace 7 28 
ON ait «Sie esecaut fate cbodeienn eraeaes ans ete 185 130 
Colombia ; Venezuela. 
a-b. Q. Colombia. (Types.) 
c-d. ¢. Venezuela. (Types of A. ohivacea.) 
25. OREOSAURUS. 
Oreosaurus, Peters, Abh. Berl. Ac. 1862, p. 201. 
Tongue moderately elongate, arrow-headed. Lateral teeth com- 
pressed, bi- or tricuspid. Head with large regular shields.; fronto- 
nasal separating the nasals ; no prefrontals ; frontoparietals present ; 
nostril pierced in the middle of a single nasal. Eyelids developed, 
lower with a non-transparent disk. Ear exposed. Limbs well de- 
veloped, pentadactyle. Dorsal scales elongate quadrangular, feebly 
keeled, juxtaposed, forming regular transverse rows; lateral scales 
small; ventrals large, quadrangular, smooth, arranged in longitudinal 
and transverse series. Astrong collar fold. Tail cylindrical. Males 
with femoral pores, females without. 
Colombia, Ecuador, Brazil. 
Synopsis of the Species. 
J. A loreal; four supraoculars. 
Thirty-five scales from occiput to base of tail ; 
male with five or six femoral pores on each 
BIOS fpr asins ae 5 Sark d= um dalam WAIN Ban aane 1. oculatus, p. £10. 
Forty-three scales from occiput to base of 
tail; male with ten to twelve femoral pores 
on each side 2... e eee eet ee eee eee 2. luctuosus, p. 410. 
