6 PEOCEEDINGS OF THE NATIONAL, MUSEUM vol. 66 



on May 14, 1920, It is due to Doctor Abbott's rediscovery that the 

 old name of Aloponotus rioordii may now be taken out of the syn- 

 onymy of Gycl/wra cornuta^ where it was placed provisionally by 

 Boulenger.® 



As the specimen upon which the original description was based v/as 

 in very poor condition, it will not be amiss to furnish a complete 

 description of the one in our collection. 



Description. — Adult, male, U.S.N.M., No. 62557, Duverge, Santo 

 Domingo ; October 3, 1919 ; W. L. Abbott, collector. Rostral wide, as 

 wide as mental, broadly in contact with nasals; nasal large, irregu- 

 larly rectangular, slightly higher than wide, perforated by a round 

 nostril equal in diameter to one-half the height of the rostral ; post- 

 nasal large, two-thirds size of nasal and broadly in contact with it; 

 nasals in contact with each other in middle line of snout behind ros- 

 tral for about half their width, when they are separated by a single, 

 flat, triangular shield; no conical, horn-like scales on snout; the top 

 of the head covered by irregiilarly polygonal shields, rather larger 

 and wrinkled on snout, more tubercular on frontal region, and simi- 

 lar but smaller in interorbital space; interorbital scales in 5 rows; 

 supraocular semicircles evident, though the component keeled scales 

 hardly exceed the similar scales which form the supraorbital disk; 

 occipital region only slightly elevated above supraorbital region; 

 semicircles separated by about 4 rows of smaller tubercular scales; 

 occipital scale two-thirds height of rostral, located between posterior 

 borders of semicircles from which it is separated by 2 rows of scales ; 

 a series of moderately keeled suboculars continued backwards as a 

 supratympanic series to above the ear ; shields very small and tuber- 

 cular above and below the posterior half of this series; 7 or 8 

 supralabials to a point beneath the center of the eye ; a series of small 

 scales separating the suboculars and supralabials; tympanum ellip- 

 tical, erect, large; 7 or 8 lower labials to center of eye; a series of 

 enlarged malar scales, the posterior ones moderately keeled and sepa- 

 rated from the lower labials by one or two rows of flat scales as large 

 as the anterior malars; dorsal and ventral scales rhomboidal, ob- 

 liquely keeled, the keels pointing toward the median line; dorsal 

 scales very small, about 110 scales measured posteriorly from the 

 axillary contained in the distance from end of snout to anterior edge 

 of tympanum; ventral scales slightly larger than dorsals and more 

 distinctly keeled; from the occiput along the median line of the neck 

 and back a series of enlarged, strongly keeled scales forming a high 

 serrated crest which is much reduced on the shoulders and on the 

 rump but is continuous with the caudal crest; scales of nuchal crest 



6 Cat. Liz. Brit. Mus., vol. 2, 1885, p. 1881. 



