220 BULLETIN 17 7, UNITED STATES NATIONAL MUSEUM 



scales; frontals and prefrontals separated from the can thai scales by 

 an elongate rhomboidal scale; three pairs of supraorbitals; seven 

 supraoculars on each side; a small occipital, bordered by a pair of 

 narrow parietals, followed on each side by a broad parietal twice as 

 broad as the inner; anterior head shields smooth, supraoculars and 

 parietals striate; five upper and five lower labials. Dorsal and lateral 

 scales sharply keeled, slightly mucronate; ventral scales smooth ; about 

 forty scales around the middle of the body; scales of the sides of the 

 neck like the dorsals; dorsal and caudal crests low. 



"Back greenish gray, nearly uniform; sides darker; venter lighter 

 greenish gray, throat and chin heavily spotted with dark brown. 



"Notes on Paratypes. — The two paratypes agree in essential charac- 

 ters with the type. The smaller specimen has a faint dorsolateral line 

 anteriorly. Both have only two scales in the median series, between 

 tQe frontals and prefrontals." 



LEIOCEPHALUS PERSONATUS ALTAVELENSIS Noble and Hassler 



Figures 64, 66a; Plate 7, B 



1933. Leiocephalus altavelensis Noble and Hassler, Amer. Mus. Nov., No. 652, 

 p. 14. 



Original description. — ' 'Diagnostic Characters. — Closely allied 

 to Leiocephalus barahonensis Schmidt from which it differs in its con- 

 spicuously spotted head; the throat grayish in the female or dark 

 bluish-black in the male, but always with some indication of white 

 spotting in both sexes. No conspicuous spots or stripes on the body, 

 but the female with feeble bars of dark brown across the back and 

 frequently some indication of a pale dorsolateral stripe. Scales be- 

 hind ear keeled and imbricate, not granular. Three scales on each 

 side between the rostral and supraoibital ring; the posterior separated 

 from the can thus by a wedge-shaped scale. About fifty scales around 

 the middle of the body; hind leg reaching between the ear and eye. 



"Detailed Description. — Type: A.M.N.H. No. 51055, adult male. 

 Collected on Alta Vela Island, D. R., October 9-10, 1932, by W. G. 

 Hassler. 



"Anterior head-shields smooth, posterior ridged; three enlarged 

 scales, a supranasal, a prefrontal and a frontal on each side of the 

 snout between rostral plate and supraorbital ring; the posterior of 

 these three scales more than twice as large as either of the anterior; 

 these three scales on each side separated from the homologous row on 

 the opposite side by a median row of three scales; the supranasals 

 narrowly in contact anteriorly; nasals and supranasals in broad con- 

 tact with rostral; frontal separated from the canthus by an elongate 

 wedge-shaped scale; two or three scales between this elongate scale 

 and the nasal; two heavy rounded canthus scales followed by four 

 long and very narrow superciliarics, the first three of which greatly 



