314 Annals of the Carnegie Museum. 



of the ear, continuing along the lower side of the white latero-dorsal 



stripe. 



Genus Prionodactylus Peters. 



24. Prionodactylus albostrigatus sp. nov. (Plate XXXIV.) 



Snout as long as the distance between the posterior angle of the 

 eyelids and the anterior margin of the ear-opening. Nostril in a single 

 nasal, a little in front of the center; frontonasal undivided, pentagonal, 

 sides strongly divergent, much wider than long, anterior margin equal 

 in length to the posterior margins; prefrontals of moderate size, meet- 

 ing in a suture which is half as long as the shields; frontal once and a 

 half as long as broad, longer than its distance from the rostral, as long 

 as the interparietal, obtusely pointed in front, rounded behind, half 

 as broad at the back as in front; two frontoparietals, a little larger 

 than the prefrontals; parietals not quite so large as the interparietal; 

 three occipitals, the central one smallest; postoccipitals small, irregular, 

 three or four; three supra-oculars, the anterior largest, the first and 

 second in contact with the frontal; a large anterior supraciliary; a 

 large loreal; a small triangular pre-ocular; temples covered by irregular, 

 moderate sized shields; eight upper labials, the third and fourth largest, 

 the last very small, the center of the fourth below the middle of the eye; 

 seven or eight lower labials; mental moderate; chin-shields large, one 

 anterior and four pairs, the second pair larger than any of the others, 

 the third and fourth pairs separated by a pair of large shields In contact 

 medially, behind which is a pair of smaller shields; two longitudinal 

 rows of large transverse gulars, six in each row; six collar-shields, the 

 two central ones wider than the gulars, as wide as the combined width 

 of the two small, outer, collar-shields. Tympanum as large as the 

 transparent disc of the eye. Its long axis slightly inclined from the 

 perpendicular. 



Dorsal scales strongly keeled, pointed, with straight sides, twice as 

 long as broad, twenty-eight transverse rows between the postoccipitals 

 and the sacrum; lateral scales smaller than the dorsals, but not ex- 

 tremely small, except around the bases of the limbs, where the scales 

 are almost granular; twenty-seven scales around the middle of the 

 body. Ventral shields in six rows, those of the four inner rows large 

 and of equal size, those of the outer rows about half as large; in seven- 

 teen transverse rows. A single pair of large posterior pre-anal shields, 

 in front of which is a pair of anterior pre-anals about half as large. 

 The front of the hind limb Is covered with large shields, the back with 



