48. ura. 215 
ridge of the os quadratum above the large tympanum. Scales abovo 
minute, except six carinate dorsal rows, of which the median of each 
three is larger than the others ; a dorso-lateral dermal line on each 
side is covered by rounded scales larger than those of the adjacent 
regions. Colour blue above, with eight pairs of black spots between 
scapular and crural regions, which are more or less connected across 
the median line; another series of black spots alternating on the 
sides ; a large black crescent on scapula on each side; gular region 
cross-banded with blackish. 
millim. millim. 
Total length (tail re- Head (to posterior 
produced) ...... 175 margin of tym- 
From snout to vent. 74 panum) wecowdans 18 
Socorro, Revillagigedo Islands. 
9. Uta bicarinata. 
Phymatolepis bicarinatus, A. Dum. Arch. Mus. viii. p. 549, pl. xxiii. 
fig. 2; Bocourt, Miss. Se. Mex., Rept. p. 165, pl. xvii. bis. fig. 9. 
Uta bicarinata, Cope, Proc. Ac. Philad, 1864, p. 177. 
Frontal usually undivided, separated from the occipital by the pair 
of frontoparietals ; four large supraoculars ; anterior border of ear- 
opening not denticulated, or with a few small projecting tubercles. 
A deep fold or pouch on each side of the throat in front of the collar, 
not connected by a distinct transverse fold. Dorsal scales minutely 
granular, intermixed with irregularly scattered enlarged keeled or 
subconical scales and a more or less regular series of enlarged keeled 
scales on each side of the vertebral line, which is minutely scaled ; 
the largest dorsal scales larger than the ventrals. The adpressed 
hind limb reaches the axilla in the female, between the shoulder 
and the ear in the male; the largest scales on the limbs a little 
larger than the largest dorsals. Femoral pores, eight to twelve on 
each side. Tail a little longer than head and body; upper caudal 
scales of unequal size; subcaudals keeled. Brownish above, spotted 
or marbled with darker, or dotted with lighter; lower surfaces 
whitish, throat brown-dotted ; the male’s belly entirely blue. 
millim. millim 
Total length ...... 124 Fore limb........ 24 
Head: ww sagen oes 12 Hind limb........ 34 
Width of head .... 10 MSS rept acetate te iariacacste 69 
Body es seevaceawes 43 
Western Mexico. 
a, Q. Tehuantepec. 
b-c. S. Cuernavaca. 
d. 3. Presidio. Hr. Forrer [C.). 
eo. Ventanas. Hr. Forrer ret 
f. Yg. Ciudad. Hr. Forrer [C,]. 
