614 



REPORT OF NATIONAL MUSEUM, 1902. 



Cope's variety exul is only the young of the present species, and as 

 his paper clearly has the priority over that by Bernhardt and Luetken 

 (in fact they refer to it themselves) the name given by him must take 

 precedence over A. riisei. 



Description.— Adult; U.S.N.M. No. 27221; Utuado, Porto Rico, 

 April 7, 1900; L. Stejneger collector. — Rostral forming an acute angle 

 behind; nostril between two nasals; anterior pair of nasals broadly in 

 contact behind rostral; frontonasal longer than wide, in contact with 

 nasals, loreal and prefrontals; prefrontals broadly in contact; frontal 

 pentagonal, in contact with first and second supraoculars, just touching 

 the third; a pair of frontoparietals in contact with third supraocular 

 anteriorly; five occipitals in a transverse row, the median largest; six 

 or seven superciliaries; four supraoculars, the first in contact with two 

 anterior superciliaries, and separated from the loreal by the first of 

 the latter; three posterior supraoculars separated from superciliaries 

 by a double row of granules; last two supraoculars separated from 

 outer occipitals by three rows of small scales or granules; loreal undi- 

 vided; six large supralabials, first in contact with 

 both nasals, second with posterior nasal and loreal; 

 temples granular surrounded by larger scales; 

 mental followed by an unpaired postmental; five 

 large infralabials; first pair of chin-shields sepa- 

 rated by granules of the chin; between infrala- 

 bials and chin-shields a wedge of one to three 

 granules extending anteriorly nearly to the post- 

 mental ; chin and throat covered with minute gran- 

 ules of slightly varying size, a faintly indicated 

 band of slightly larger ones extending across the 

 middle in which again the median ones are forming an ill-defined cen- 

 tral group of somewhat enlarged scales; on the portion between the 

 two throat folds (the so-called mesopthychium) several rows of larger 

 hexagonal scales; back, sides, and upper side of limbs covered with 

 very fine uniform granules; underside of body with ten longitudinal 

 and thirty-five transverse rows of square plates; three large preanal 

 shields forming a triangle; on the lower arm a series of very wide 

 plates (antebrachials) decreasing in width toward the elbow joint by 

 being dissolved into several rows of smaller hexagonal scales; on the 

 upper arm a similar but narrower series of plates (brachials or 

 humerals) not continuous with the antebrachial series; on the poste- 

 rior side near the elbow a small group of enlarged scales (postbra- 

 chials); underside of thighs covered with six or seven series of hexago- 

 nal plates, of which three rows are considerably larger than the others; 

 fourteen to fifteen femoral pores; on the underside of tibia two rows 

 of plates, two of the plates of the outer row being enormously enlarged; 

 upper side of wrist with regular series of transverse plates correspond- 



Fig. 66.— Ameiva exul. 

 2 x natural size. Dorsal 

 view of portion of tail. 

 No. 27221, U.S.N.M. 



