138 BULLETIN 17 7, UNITED STATES NATIONAL MUSEUM 



the loreal region, composed of four elongate, narrow shields, the second 

 and third much longer than the others ; superciliary ridge consisting of 

 one very long and narrow anterior shield followed by a double row of 

 small elongate scales separating the supraocular granules from those 

 surrounding the eye; loreal rows five; subocular semicircle composed 

 of about six keeled scales, the fourth much the longest, the tliird, 

 fourth, and fifth in contact with the supralabials; eight or nine supra- 

 labials, the sixth coming below the center of the eye; temporals gran- 

 ular, with a well-developed double supratemporal line of scales; dorsal 

 scales arranged in 10 longitudinal rows of enlarged, keeled scales, the 

 inner ones about as large as the ventrals, the outer rows becoming 

 smaller and merging rapidly with the lateral granules which in turn 

 give way to the enlarged, keeled, imbricate ventrals; about 14 scales 

 along the middle of the back equal the standard distance from tip of 

 snout to center of eye; scales of gular fan elongate, at least thrice the 

 size of the ventrals, wrinkled, set in widely separated longitudinal 

 series on the naked skin of the gular fan, the edge of which is slightly 

 thickened; throat scales quite small, keeled, mostly rectangular; arms 

 above covered with keeled scales as large as the ventrals; femur with 

 some scales considerably larger than the ventrals; scales covering hands 

 and feet above strongly pluricarinate ; digits very long and slender, 

 expansion moderate; 20 lamellae under the second and third phalanges 

 of fourth toe, 30 under the entire toe; tail very long, more than 2}^ 

 times the length of the head and body, moderately compressed, cov- 

 ered by large, imbricate, keeled scales with but slight indications of 

 verticils, and the median series above consisting of similar but some- 

 what more heavily keeled scales forming a very feebly serrated edge; 

 a pair of postanal plates large and prominent. Nuchal fold apparent, 

 dorsal fold very weak. 



Dimensions: Head and body, 40 mm.; tail, 96 mm.; tip of snout to 

 posterior ear, 12 mm.; width of head, 6 mm.; foreleg, 15 mm.; hind- 

 leg, 35 mm. 



Color (in alcohol): Ground color above ecru-drab changing to 

 pinkish buff on snout and tail; a clearly marked white lateral stripe 

 originating below the eye and set off above and below along the sides 

 by black vermiculations, which are densest above the shoulder; 

 below immaculate pale olive-bufF ; the skin of the gular fan black, the 

 large scales white; on the scapular region the black vermiculations 

 appear as a pair; otherwise the middorsal area is light and unspotted, 

 like the head in this specimen ; arms, legs, and tail very faintly marked 

 with brown. 



Variations. — On many of the specimens the pair of black scapular 

 markings is very obvious, taking the shape of a crescent or oval on 

 each side of the middorsal line. In addition, most of the specimens 

 have a pair of small round spots, one on either side of and a little 



