268 BULLETIN 17 7, UNITED STATES NATIONAL MUSEUM 



Description. — U.S.N. M. No. 83882, an adult from Beata Island, 

 Dominican Republic, collected on May 11, 1931, by Dr. A. Wetmore 

 and F. C. Lincoln. Rostral forming an obtuse angle behind; nostril 

 in the lower part of the anterior nasal plate, which is broadly in con- 

 tact with its fellow behind the rostral; frontonasal wider than long, in 

 contact with both the nasals, loreal, and prefrontal; prefrontals 

 broadly in contact; frontal elongate, pentagonal, in contact with the 

 first tliree supraoculars; five occipitals in a transverse row, the me- 

 dian rectangular, slightly smaller than the adjacent scales; seven 

 supercUiaries, the first in contact with the loreal, the third the longest; 

 four supraoculars, the first in contact with (on one side barely sepa- 

 rated from) the loreal and with the first two superciliaries ; a pair of 

 small frontoparietals broadly in contact with the third supraocular; 

 the three posterior supraoculars separated from the supercUiaries by a 

 single row of granular scales; five occipitals, the median one the small- 

 est, those adjacent to it the largest; the fourth supraocular on one side 

 completely separated by granular scales from the occipital bordering 

 the median one, on the other side partially in contact with it; loreal 

 undivided; about seven supralabials, the last very small, the third 

 and fourth largest, the intersection between the fifth and sixth coming 

 directly below the center of the eye, the first in contact with the 

 rostral and nasals, the second in contact with posterior nasal and loreal; 

 temples with small scales a little larger than those on the back, the 

 outer scales distinctly larger; mental followed by an unpaired post- 

 mental; five infralabials, the first small, the last four large and sub- 

 equal; four pairs of large chin shields, the first pair completely in 

 contact; between infralabials and chin shields a wedge composed of a 

 single series of small scales extending anteriorly to the middle of the 

 third infralabial; chin and tliroat covered with gi'anules of fairly regu- 

 lar size, becoming somewhat larger on the jaws below the ears; on the 

 mesoptychial region about half a dozen rows of larger hexagonal 

 scales, the largest about twice the size of the tliroat scales; back, sides, 

 and upper part of limbs covered with fine, uniform granules, except 

 the upper arm, which is covered above by large, imbricate scales; about 

 30 dorsal granules in the standard distance from center of eye to tip of 

 snout; under side of body with 8 longitudinal and 33 transverse rows 

 of rectangular plates; three large preanal shields forming a triangle, 

 the anterior scale the largest; on the lower arm two series of wide ante- 

 brachial plates, the outer one of which continues along the upper 

 arm, becoming narrower at the elbow; in addition to this antebrachial 

 row on the upper arm there are five other rows behmd it, the fourth 

 (post-antebrachial) having increasingly wider scales as it nears the 

 elbow joint; under side of thighs covered with several rows of hex- 

 agonal plates ; femoral pores 14 and 1 6 ; under side of tibia with two rows 

 of plates of which one in the outer row is enormously enlarged; upper 



