300 thp: plagiostomta. 



absent over the abdomen, continued on the tail. On the body there is a median 

 band of very small spines. Tail shorter than the body, dorsal fins near the end 

 and separated from one another by a space. 



Dull greyish violet, faintly and sparsely mottled with darker. 



Total length nearly 12.44, length of body 6.69, length of snout 1.69, and 

 greatest width about 9.37 inches. 



Near Iquique, Chile. 



Raia brachyurops. 



Raia brachyura Gunther, 1880, Challenger rept. Zool., 1, p. 20, pi. 6; Vaillant, 1888, Cap. Horn. 



Poissons, p. 14, pi. 2, f. l-l'' (non Lafonte, 1873). 

 Raia brachurops Fowler, 1910, Proc. Acad. nat. sci. Phil., 62, p. 468. 



Disk broader than long, anterior angle obtuse, anterior margin concave 

 toward the outer angle, outer and hinder angles and margins broadly rounded. 

 Width of interorbital space less than distance from eye to end of snout, or more 

 than length of orbit plus spiracle. Mouth nearly transverse; teeth pointed, in 

 about 35 rows. Ventrals deeply notched, anterior portion small. Tail stout, 

 shorter than the body, slightly produced behind the dorsals, which latter are 

 separated by a short space with a spine. Back rough with minute spines; a 

 median series of conical tubercles on back and tail. 



Brown marbled with darker and lighter. 



Total length, of male, 27i, snout to vent 142, and greatest width I85. 



Total length, of female, 322 snout to vent 18, and greatest width 25. 



Magellan Straits and westward. Station 313 in 55 fathoms and Station 314 

 in 70 fathoms. 



Raia magellanica. 



(?) Raia magellanica Philippi, 1902, Rev. Chil., 6, p. 59. 



Raia magellanica Steindachner, 1903, Zool. jahrb., Suppl., 6, p. 212. 



Disk little broader than long; snout somewhat produced; anterior margins 

 slightly concave in the middle third of their length, more strongly convex toward 

 each end; outer angles more bluntly rounded than the hinder. Teeth with a 

 short point. Back with small sharp spines. A tubercle in front of and another 

 behind each eye ; at each side of the median row nearly above the shoulder girdle 

 a row of three, anterior nearer the middle and stronger. Behind the shoulder 

 girdle at each side of the median row there are three to four rows of smaller 

 tubercles, continued on the top of the tail. Lower surfaces smooth. Dorsals 

 separated by a narrow space. 



