RAIA [NTERRUPTA. 345 



angle, nearly parallel with the hinder margin, in irregular scries. Skin rough 



with close-set setiform spines, absent from the anterior and the posterior margins, 

 the orbital region, the greater part of the tops of the ventrals, and the lower 

 side of the base of the tail, larger along the sides of the tail. No larger spines 

 on the orbital ridges. A vertebral series of broad based tubercles on back and 

 tail, interrupted above the body. 



Uniform brown above and below, back obscurely marked anteriorly by 

 small spots of darker with definite margins. 



Type a male, 45 inches long, taken off the Queen Charlotte Islands, British 

 Columbia, in a depth of 1588 fathoms. 



Raia parmifera. 



Raia parmifera Bean, 1881, Proc. U. S. nat. mus., 4, p. 157; Jordan & Gilbert, 1882, Bull. 10, U. S. 

 nat. mus., p. 878; Gilbert, 1895, Rept. U. S. fish coram., for 1893, p. 395; Jord. & Everm., 1896, 

 Bull. 47, U. S. nat. mus., p. 74. 



Disk broader than long, tip of snout slightly produced, anterior margins 

 undulated, posterior convex, width equal entire length behind the shoulder 

 girdle. Internarial width about two thirds and interorbital width about two 

 sevenths of their respective distances from the end of the snout. Mouth slightly 

 arched; teeth with a short rather sharp median cusp, in about 26 rows. Tail 

 shorter than the body; dorsals separated by a tubercle. Roughened by small 

 spines on the crown, on the margins of the pectorals and the ventrals, on the 

 base of the tail and, by larger ones, along the sides of the tail. A median series 

 of tubercles (29) on back and tail. On the male the greater portion of the disk 

 is smooth and tenacula appear near the outer angles; the claspers are slender 

 and of more than half the length of the tail. 



Olive-brown, with numerous indistinct lighter blotches, two of them larger, 

 one enclosing a blotch of white as large as the eye. Two small blotches of light 

 brown behind the ventrals on the tail. 



Total length 38s, length of disk 20 and greatest width 27 inches. 



Unalaska. 



A close ally, perhaps a variety, of R. stellulata. 



Raia interrupta. 



Raia interrupta Gill & Townsend, 1897, Proc. Biol. soc. Washington, 11, p. 232; Jord. & Everm., 1898, 

 Bull. 47, U. S. nat. mus., p. 2751. 



Snout moderate, blunt, rostral cartilage soft, narrow. Interorbital space 

 concave. Mouth small, width equal half the length of the snout. Upper 

 surfaces roughened by spinules, except on the end of the snout. No tubercles 



