226 BULLETIN 17 7, UNITED STATES NATIONAL MUSEUM 



by a relatively large wedge-shaped scale; two heavy rounded can- 

 thai scales followed by three long and narrow superciliaries and 

 two small terminal ones; six (on one side five) distinctly ridged supra- 

 oculars separated from superciliaries and from frontals by a row of 

 small keeled scales; occipital exceedingly small, lying at the anterior 

 border of the inner parietals but scarcely shortening their suture, 

 and not distinguishable from the surrounding scales except by its 

 position; the inner and outer parietals approximately equal in size; 

 no conspicuously enlarged latero-nuchal scales; four upper and four 

 lower labials to a point below the center of the eye; temporal scales 

 increasing gradually in size, the last one just above and in front of the 

 ear being the largest and most conspicuous; anterior border of the 

 ear with four rather short projecting scales. Dorsal scales relatively 

 smaller than in the allied forms, imbricate and highly mucronate, the 

 length of the spiny scale-tips giving to the animal a very bristling 

 appearance; laterals as large as dorsals; ventrals larger than either 

 dorsals or laterals, smooth, their posterior edges denticulate; about 46 

 scales around the middle of the body; about 64 scales from the occiput 

 to a point directly above the vent; about 14 dorsal scales the equival- 

 ent of the distance from snout to occiput; nuchal scales small, those on 

 the sides of the neck like the dorsals, those behind the ear keeled and 

 imbricate, not granular. Shoulder folds present; no lateral folds. 

 The adpressed hind limb barely reaches the ear. Digits compressed, 

 the fourth toe with 22 tricarinate lamellae. A very prominent dorsal 

 crest beginning on the occiput, the sharply pointed elongate scales 

 about equally developed along the back and on the distal portion of 

 the tail, then decreasing; the other caudal scales keeled and very 

 highly mucronate; no verticils. The keels of the lateral and dorsal 

 scales are directed upwards and backwards, so that the scale-rows 

 converge strongly on the back. Tail highly compressed. A pair of 

 enlarged post-anals in the male. 



"Dimensions. — Snout to vent, 75 mm.; head to posterior ear, 17 

 mm.; tail defective; foreleg, 27 mm.; hindleg, 57 mm.; width of head, 

 13 mm. 



"Color in alcohol. — Body color dull sage green above, glaucous blue 

 to china blue below; a wide light dorsolateral stripe; another similar 

 light lateral stripe from axilla to groin; indications of sepia crossbars 

 on the nape of the neck; the body-scales above and below the light 

 dorsolateral line with sepia posterior borders, and sometimes the 

 upper half of each scale dark also ; tail with faint indications of sepia 

 cross bars at regular intervals; limbs sage green, without bars or spots; 

 the lower lip spotted with triangular sepia markings which coincide 

 with the sutures between the lower labials ; mental plate edged anteri- 

 orly with sepia; a few sepia spots along the chin below the labials; the 

 remainder of the throat immaculate china blue; sides of head from 



