6, CNEMIDOPHORUS, 369 
gular scules gradually enlarged ; mesoptychium with three or four 
rows of enlarged scales, the posterior largest, a little larger than the 
largest gulars ; the mesoptychial scales forming the border of the 
collar. Dorsal granules extremely minute, smooth. Ventral plates 
in eight longitudinal and thirty-six to thirty-eight transverse rows. 
Three large preanals, forming a triangle. Four or five rows of 
brachials, anterior Jargest, continuous with the postbrachials ; ante- 
brachials continuous with brachials, in three rows, the outer largest ; 
enlarged scales under the fore arm. Light to ten rows of femorals 
one of which is large; tibials in two or three rows, outer largest. 
Femoral pores nineteen to twenty-two. Males without anal spines. 
Caudal scales slightly oblique, feebly keeled, not pointed posteriorly. 
Olive or reddish brown above, the sides largely spotted or marbled 
with black, the spots sometimes forming vertical bars on the flanks ; 
young with six light longitudinal lines, as in C. sealineatus, which 
gradually disappear; hind limbs with round light spots; belly 
‘blackish blue in males. 
millim. millim. 
Total length .......... 383 From end of snout to fore 
H6ad wince ayee duane 30 Nib: . sa aeeee awe 46 
Width of head.......... 1% From eud of snout to vent 123 
From end of snout to inter- Fore limb 2 .cceueeess 45 
parietal plate ........ 22 Hind Wir: n.saacae wn sa 85 
Width at posterior corners Pails) -sknekcnwiee ane ie 260 
of supraocular regions.. 11 
Tres Marias Islands. 
a-e. 3, hgr., & yg. Tres Marias Islands. Hr. A. Forrer | C.}. 
7. Cnemidophorus maximus. 
Cnemidophorus maximus, Cope, Proc, Ac. Philad. 1863, p. 104. 
Nostril anterior to nasal suture. Four supraoculars ; anterior 
gulars abruptly larger, their median largest; plates of the collar 
graduating into the posterior gulars, the marginal largest, the series 
concave anteriorly in the middle. Dorsal scales minute. Ventral 
plates in eight rows. Praanals in four transverse series, the 
posterior two containing six. Brachials in seven rows ; antebrachials 
in four; femorals in seven; tibials in four. Above olive-brown, 
with three brown bands on each side, which are as wide as the 
intervals between them, and are so broken by spots of the ground- 
colour as to resemble series of confluent brown variegations ; posterior 
extremities coarsely reticulate with the same colour; superior 
surface of tail and gular region blackish, varied; abdominal shields 
black-tipped. 
From end of snout to gular fold 4 centim.; from gular fold to 
vent 8; from vent to end of tail 22. 
Cape St. Lucas, California. 
VOL, IT. 23 
