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VII. Description of a new Species of Agama, brought from the 
Columbia River by Mr. Douglass. By — Er Esq., 
F.R.S. § L.S. b BG 
Read June. Bh LARR: 
Genus. AGAMA. Ddk: ker: : U 
AGAMA. Dovenassni ` s ai 83234 
Jas. X 
A. Poris femoralibus utrinque xx. 
Habitat in ord occidentali Americe Borealis ad ripas fluminis 
Columbie. : 
Ix its general form, colours, and marking, this species very 
. much resembles A. superciliosa, A. orbicularis, and others of the 
same section of the genus. The head is obtusely triangular, 
with a distinct ridge overhanging the orbits: the body sub- 
orbicular and depressed ; the tail tumid at its origin, from 
whence it becomes rather suddenly contracted, and tapers to 
its extremity. The head, body, limbs and tail, are covered 
on the upper side with small raised scales, interspersed with 
larger ones which are aculeated, and most of them quadran- 
gular. These form distinct ridges over the eyes, above the 
ears, across the occiput, and along the sides of the body and 
tail. The under side is wholly covered with small uniform 
smooth scales. The gular fold is of considerable size. The 
colour of the upper part is a mixture of yellowish-white and -— 
VOL. XVI. cp Nc pm 
