26 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 92 



separated from the semicircle by one row of granules, which in front 

 of the disk form a patch of granules; canthus rostralis very sharp, 

 consisting of three subequal elongated shields, merging with the super- 

 ciliary ridge which also has three scales, of which the middle one is 

 much the longest, the posterior one followed in turn by a double row 

 of granules; five loreal rows; subocular semicircles keeled, widely in 

 contact with the posterior supralabials ; seven enlarged supralabials, 

 the seventh under the center of the eye, followed by three or four 

 granular labial scales ; temporal granules a little larger than the dorso- 

 laterals ; a well-marked double series of small scales forming the supra- 

 temporal line ; dorsal and lateral granules minute, tubercular ; four or 

 five median rows of slightly enlarged, keeled scales down the center 

 of the back beginning on the nuchal region, continuing on the tail as 

 a crest of considerably enlarged scales; ventral scales medium-sized, 

 smooth, rectangular, those on the throat small and bluntly tuberculate ; 

 anterior face of fore and hind legs covered with large, weakly keeled 

 scales much larger than the ventrals ; scales covering the hands and 

 feet above very faintly unicarinate ; digital expansion wide, with about 

 24 lamellae under the second and third phalanges of the fourth toe, 

 39 under the entire toe ; tail long, compressed, with very poorly-marked 

 verticils of aligned scales ; those between similar in size but not in 

 alignment, in about five or six irregular rows, all imbricate, keeled and 

 distinctly mucronate at the tips, surmounted by a strongly serrate 

 edge of enlarged, keeled scales triangular in profile, four (sometimes 

 three) to every verticil, the last of each group distinctly enlarged ; 

 dewlap with many closely set series of scales, whose posterior borders 

 are projecting and mucronate; postanal plates large and well de- 

 veloped ; a slight skin fold along the neck and back. 



Dimensions. — Snout to vent, 59 mm; tail, 114 mm; orbit to tip of 

 snout, 9.5 mm; orbit to orbit, 7 mm; snout to posterior ear, 19 mm; 

 snout to center of eye, 12 mm; width of head, 11.5 mm; fore leg, 

 26 mm ; hind leg, 42 mm ; tibia, 15 mm. 



Color in alcohol. — Entire head olive-bufif ; upper parts of body and 

 Hmbs very pale immaculate glaucous-blue; lower surfaces and tail 

 ecru-drab. 



Variation. — The other specimen from St. Peter, U.S.N.M. no. 

 79003, a young female, dift'ers slightly from the described specimen in 

 having even weaker indications of keels on the supraocular disk, the 

 supraocular semicircles mutually in contact for a short distance, larger 

 preoccipital scales, and only one scale between the occipital and the 

 semicircles. 



