THE HERPETOLOGY OF HISPANIOLA 213 



and Watson Perrygo. Head shields enlarged, strongly ridged, the 

 posterior ones with more closely set ridges than the anterior; three 

 scales (an internasal and two prefrontals) between the rostral and 

 the beginning of the supraorbital ring, the posterior one very large; 

 nasal in contact with rostral; internasals somewhat elongate, in 

 contact with each other; the prefrontals and internasals embracing 

 a medial series of five scales, the first one between the posterior parts 

 of the internasals, the others in contiguous sets of two between the pre- 

 frontals; prefrontals in contact with the canthals on one side of the head, 

 separated by an elongate scale on the other (normal) side ; two heavy 

 rounded can thai scales, followed by three long and narrow super- 

 ciliaries and two very small terminal ones; six ridged supraoculars 

 separated from superciliaries and from frontals by a single row of small 

 keeled scales ; frontals large, widely in contact; occipital small, bordered 

 by two distinct pairs of parietals on each side, the inner as large as 

 the outer and about three times as large as the occipital; four upper 

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

 scales increasing regularly in size, the last one, just above and in 

 front of the ear, the largest and most conspicuous; anterior border 

 of the ear with four coarse projecting scales. Dorsal scales large, 

 imbricate, and highly mucronate; laterals considerably smaller than 

 the dorsals; ventrals slightly larger than the dorsals, smooth, their 

 posterior edge slightly denticulate; about 45 scales around the middle 

 of the body; about 62 scales from the occiput to a point directly 

 above the vent; about 15 dorsal scales the equivalent of the distance 

 from snout to occiput; nuchal scales rather small, those on the sides 

 of the neck like the dorsals, those behind the ear keeled and imbri- 

 cate, not granular. Shoulder folds present, but no lateral folds. 

 The adpressed hind limb reaches to the anterior border of the ear. 

 Digits compressed; the fourth toe with 25 tricarinate lamellae. A 

 high distinct crest beginning at the occiput, equally developed on the 

 back and on the proximal portion of the tail but decreasing as the 

 tail tapers; the other caudal scales keeled and mucronate; no verticils. 

 The keels of the lateral and dorsal scales are directed upward and 

 backward so that the scale rows converge strongly on the back. 

 Tail highly compressed. Adult male with top of snout swollen and 

 decidedly convex; a transverse series of several enlarged and elongate 

 postanals. 



Dimensions Snout to vent, 72 mm.; head to posterior ear, 18 

 mm.; tail, 122 mm.; foreleg, 28 mm.; hindleg, 58 mm.; width of 

 head, 14 mm. 



Color (in alcohol) : Body color above pale china blue on back, arms 

 and legs turning to drab on the neck, with tinges of light madder 

 brown along the sides; each scale on the sides and up to the mid- 

 dorsal region with a black outer posterior border, which causes the 



