478 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
teriorly by many small ones; four supraoculars, the second divided 
longitudinally into three parts, the last two considerably larger than 
the anterior ones; two posterior supraoculars separated from the 
supraciliaries by a single row of granules; six large supralabials; five 
infralabials; between infralabials and chin-shields a wedge of a single 
row of scales extending anteriorly to the second pair of infralabials; 
chin and throat covered with minute granules, a band of slightly 
larger ones extending across the middle; on the area between the two 
throat folds a single row of very large scales; under side of the body 
with eight longitudinal rows, outer row much narrower than the 
others and twenty-six transverse rows of plates; a pair of large pre- 
anal plates arranged one ahead of the other in the mid-region and sur- 
rounded by a series of small scales; on the lower arm a single row of 
large antebrachials becoming double proximally; on the upper arm 
a single row of large brachials continuous with the antebrachials; 
on the posterior side near the elbow joint a single row of large post- 
brachials; under side of the thighs covered with three rows of large 
plates breaking up proximally into six or eight rows; fourteen femoral 
pores; on the under side of the tibia two rows of scales, outer about 
twice as large as the inner; upper side of the wrist with one or two 
transverse series of large scales; outer toe extending about as far as 
the inner; tail covered with straight, keeled scales, dorsally strongly 
keeled; about seventeen scales in the fifteenth ring from the base. 
Coloration:— Dorsal surface dark olive-brown; on each side a dark 
brown or blackish band, bordered above and below by a light stripe, 
the three stripes running the length of the body from the eye to the 
middle of the tail; ventral surface pale blue-gray suffused with straw- 
color. 
Remarks:— The description was made of a half grown .male, the 
only specimen examined, that measured eighty-six millimeters from 
snout to vent. 
AMEIVA BRIDGESII (Cope). 
Description:— Adult male; M. C. Z. 6988. Gorgona Island, Colom- 
bia; 1905; W. W. Brown, Jr. 
Rostral forming about a right angle behind; nostril between the 
two nasals; anterior pair of nasals broadly in contact behind rostral; 
frontonasal a trifle longer than wide separated from the loreal; pre- 
frontals keeled, separated by six or seven intercalated, keeled scales 
forming part of a series which divides the frontal and frontoparietals; 
frontal formed of about ten irregularly arranged keeled scales; fronto- 
parietal and occipitals formed of numerous irregularly arranged, small 
keeled scales, the two scales in the median occipital region largest; 
