384 



BULLETIN 58, UNITED STATES NATIONAL MUSEUM. 



small, narrow, iirceolate, the posterior outline rounded, the lateral 

 sutin-es greatly concave; supraoculars excessively large, much larger 

 than frontal, very broadly in contact with prefrontals; parietals 

 large, the suture between them longer than the frontal; nostril a 

 round hole in the middle of a single nasal; canthus rostrrilis sharp, 

 overhanging the very concave loreal region; a small lozenge-shaped 

 loreal; a single, large, concave preocular; three postoculars; tem- 

 porals 2 + (l small) +3, the lower anterior on left side coalesced with 

 supralabial; mouth very deeply cleft, with 8 supralabials, first long, 

 in contact with loreal, 4, 5, and 6 in contact with eye; 8 lower labials, 

 3 in contact with first pair of cliin-sliields, of which there are three 

 pairs; scales smooth, without pits, in 17 rows; ventrals 175;'^ anal 

 single; subcaudals 60. ** Color (in alcohol) brownish gray densely 



Figs. 317-319.— Psammodynastes pulverulentus. 2Xnat. size. 317, top of head; 318, side of 



head; 319, UNDERSIDE OF HEAD. No. 34707, U.S.N.M. 



spotted with dusky and pale ochraceous, forming a very obscure 

 pattern; a dark narrow band from tip of snout to posterior end of 

 frontal, followed by a V-shaped mark, the opening resting on the 

 upper edge of the preoculars, the apex on the posterior end of the 

 interparietal suture; a similar band, from upper postocular along 

 outer edge of parietal; all the bands on the head composed of nar- 

 rower dusky lines with a pale line between them; from apex of 

 parietal V a solid dark line along the median line of the upper neck; 

 an obscure dusky transocular band; underside brownish gray with 

 two narrow dusky lines, one on each side of the median line; the 

 grayish ground color is produced by innumerable dusky specks 

 powdered all over the surface. 



Dimensions. 



mm. 



Total length :«2 



Snout to vent 313 



Vent to tip of tail 69 



o According to Boulenger (MS.). 



