470 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Rostral forming an acute angle behind; nostril between the two 
nasals; anterior pair of nasals just in contact behind rostral; fronto- 
_ nasal a trifle longer than wide, in contact with the loreal; prefrontals 
broadly in contact; frontal divided transversally in the mid-region, 
entirely separated from the supraoculars by a single row of granules; 
a pair of frontoparietals separated from the third supraocular, and 
part of the fourth by a double row of granules; five occipitals in a 
transverse row, the outer two slightly posterior to the others, the 
median scale slightly smaller than the rest; six supraciliaries; four 
supraoculars, the posterior one very much smaller than the others, 
the first separated from the loreal; the three posterior supraoculars 
separated from the supraciliaries by a double row of granules; last 
two supraoculars separated from the outer occipitals by four or five 
rows of granules; five and six supralabials; five and six large infra- 
labials; between infralabials and chin-shields a wedge of a single row ~ 
of granules extending anteriorly to the first chin-shield; chin and 
throat, except near the folds covered with small scales, the median 
posterior ones largest but varying gradually into the others; on the 
area between the two throat folds four or five irregular rows of scales; 
under side of the body with ten longitudinal and thirty-four trans- 
verse rows of plates, the two outer longitudinal rows formed of nar- 
rower and rounded plates; preanal plates in a triangle of three large 
ones cut into in the middle of its base by a small scale, and completed 
at the basal angles by two larger scales; on the lower arm a double 
row of antebrachials, the outer widest; on the upper arm a single row 
partly double, of very large brachials which are continuous with the 
antebrachials; on the posterior side near the elbow a single row of 
postbrachials; under side of the thighs covered distally with three 
and proximately with nine or ten rows of scales; sixteen femoral 
pores; on the under side of the tibia three rows of plates, outer widest; 
upper side of the wrist covered with scales forming a regular series of 
longitudinal rows; inner and outer toe extending approximately the 
same distance; tail covered with straight, keeled scales; about forty- 
nine scales in the fifteenth ring from the base. 
Coloration: — In the badly faded specimen before us, the upper 
surface is uniform blue-gray, the under surface milky, the outer 
ventrals spotted with pure white. But according to the original 
description (Cope, Proc. Acad. nat. sci. Phila., 1862, p. 67) the color 
was “above brownish pea-green, tail paler; in young specimen traces 
of two lateral and one median pale line, sometimes visibly posterior 
in adults. Occasionally a few brown spots on the rump. External 
belly plates varied with blue and white. Inferior surfaces yellow.” 
Remarks:— The description was made of an adult male that meas- 
ured one hundred and twelve millimeters from snout to vent. 
