158 BULLETIN 17 7, UNITED STATES NATIONAL MUSEUM 



moderate, compressed, with very well marked verticils consisting of 

 vertical series of large squarish scales, which are quite truncate at the 

 tips, separated by five or six rows of slightly smaller scales on the 

 sides of the tail; a slightly serrate crest on the tail, with four tri- 

 angular, keeled and pointed scales, the first and fourth sUghtly smaller 

 than the others which are subequal and the whole four corresponding 

 to a verticil; skin of gular fan naked, set with distant series of flat, 

 crescent-shaped scales a little longer but much narrower than the 

 ventrals; edge not thickened posteriorly; postanal scales well devel- 

 oped. A nuchal fold, diminishing on the shoulders ; a strong dorsal fold. 



Dimensions: Head and body, 41 mm.; tail defective; snout to pos- 

 terior ear, 13 mm.; snout to center of eye, 8 mm.; width of head, 

 8 mm.; foreleg, 21 mm.; hindleg, 34 mm. 



Color (in alcohol): Above dark mouse gray; a slate-black elongate 

 patch from ear to behind shoulder, bordered below by a light stripe, 

 which begins below the ear and continues to beyond the axilla; above 

 the black patch a similar light stripe parallel to the other, and begin- 

 ning above the ear and fading out between the shoulders ; a faint pale 

 area on each side of the nuchal region; limbs and tail olive above, with 

 dark sepia bars; lower surfaces immaculate olive-buff except the 

 throat, which is heavily marbled with smoky gray, the skin of the 

 gular fan being of the same hue. 



Variations. — There may or may not be a median dorsal skin fold, 

 depending upon the preservation. It is never very large, even at its 

 best. In only one out of the ten Gonave Island lizards belonging to 

 the U. S. National Museum collection is there a single large preoc- 

 cipital — the others have 2 to 6 small scales anterior to the occipital. 

 Seven out of these ten have five to eight small scales in the median 

 group anterior to the junction of the supraorbital semicircles; there 

 are four scales in two of the individuals, and two scales in only one 

 individual. Thus the average seems to be considerably higher than 

 in the mainland dominicensis, where two scales is the most constant 

 condition. There are five crest scales to each verticil of the tail in a 

 paratype, No. 77080 (erroneously called the type in the original dis- 

 cussion of variation) , of the new species, but the other six males in the 

 National collection have only four scales, the first and fourth of which 

 are only slightly smaller than the other two. There are but seven 

 vertical lateral rows to a whorl in all but one specimen, which has 

 eight. A direct comparison of tlie tails of Gonave Island and His- 

 paniolan lizards makes it at once evident that the former have much 

 more coarsely scaled tails than do the latter, while there is less pro- 

 nounced scalloping because of the greater uniformity of the crest 

 scales. 



The conspicuous black shoulder patch set off by light lines above 

 and below is apparently a constant feature of Gonave Island lizards, 



