REPTILES. 
9Q 
GerrhoNotus imbricatus, t. 31. /. 1. JViegmann, Isis., 1828. xxi. 364. Bui. Sci. 
Nat. xvii. 298. 
Olive green ; head white, speckled ; sides of the neck, body, and tail, white spotted, the spots 
placed on the end of the scales; beneath, greeenish silvery white. Tail, base compressed, angular 
above. Body angular above, flat beneath ; limbs short. 
Scales of the head convex, smooth, symmetrical, with a long seven-sided sunken parietal plate, 
much larger than all the rest, with two triangular central plates behind it ; all the other plates in pairs. 
Scales of the back rhombic, with an acute elevated oblique keel, forming ridges, placed in six or 
eight series ; those of the outer series least keeled. Scales of the sides similar, rather smaller, and 
nearly keelless, with a wide band of granular scales between them and the ventral scales. Scales of 
the upper part of the tail larger, similar, more strongly keeled, and placed in four series; of the 
sides of the tail similar, smaller, and not keeled. 
Gerrhonotus Burnettii, L 31./. 2. 
Above olive brown, varied with unequal blackish bands ; sides yellow speckled ; beneath 
yellowish white. The yellow spots are on the tips of the dark scales which form the bands. 
Scales of the back in twenty or twenty-two rows ; those of the six or eight central series the most 
keeled. The scales of the belly twelve-rowed and smooth. The scales of the head are ratherconvex, 
and smooth ; of the body square, with an oblique keel, commencing from the middle of the hinder 
part, and continued to the upper angle of the outer edge. The tail about as long as the body, thick, 
compressed on the sides, and flattish above. 
Length of the body and tail eight inches. 
This genus is nearly allied to my genus, Cicigna, but differs from it in having no femoral pores. 
Phrynosoma Blainvillii, t. 29. f. 1. 
Body yellow and brown marbled, back with scattered larger scales ; sides with two series of com- 
pressed scales, those of the upper series the largest ; the scales of the body moderately smooth, and 
keelless ; of the throat moderate, with three or four oblique diverging closer series of larger pointed 
scales, placed on each side of the middle of the throat. 
Inhab. California. 
Phrynosoma Wiegmanni. 
Middle of the back with scattered large scales ; sides of the back with two series of large, long, 
acute angular scales, the upper lateral series largest. The sides of the body with a single series oT 
long, compressed, recurved, spine-like scales, with a band of small scales beneath them. Scales of 
the belly smooth, and keelless; of the throat, small, smooth, and equal, with a collar of minute 
granular scales round the lower part of the neck. 
Length 6 in. ; tail in. ; width of sides, li in. 
From specimens in the collection of the British Museum and W. Ogilby, Esq. From Mexico. 
This may probably be the Ph. orbiculare, Wiegmann, Isis, xxi. 364. 
From these two species Dr. Harlan’s Agama armata ( Phrynosoma Harlani) appears to differ; 
the latter agrees with Ph. Blainvillii, in the double series of lateral scales and in the dorsal scales, 
but the throat in the figure has very small scales, with only a single oblique ridge of one or two series 
of rather larger scales on each side. The belly scales are smooth. 
Dr. Wiegmann has described another species from Surinam, under the name of Ph. bufonium, 
which has a double series of lateral scales, and the ventral scales keeled ; and must, doubtless, be 
distinct from either of the above. 
