RAIA LIMA. 359 



Dark chocolate-brown, little lighter below, apparently uniform; lips and 

 mouth white. 



Description from one of the types obtained by the Albatross 1904-1905 

 Expedition off Point Aguja, Peru, Lat. 5° 47' S.; Long. 81° 24' W., at a depth of 

 536 fathoms. 



Raia microps. . 



Raia microps Gunther, 1880, Challenger rept. Zool., 1, p. 12, pi. 4; Berg, 1895, An. Mus. nac. Argent., 

 ser. 2, 4, p. 14; Evermann & Kendall, 1906, Proc. U. S. nat. mus., 31, p. 70. 



Disk broader than long, obtuse in front, anterior margins straight, outer 

 and hinder angles and margins broadly rounded. Snout short, tip not produced. 

 Mouth curved, width less than half the distance from the end of the snout. 

 Teeth obtuse, in about 40 rows., Ventrals notched, anterior section large. 

 Dorsals separated by a space with a spine, not reaching as far back as the end 

 of the tail. Tail moderate, longer than the body. Minute spines on the snout, 

 the interorbital space, and along the middle of the back and the front margins 

 of the pectorals. A single spine on the middle of the back, and a series of spines 

 on the median line of the tail. Openings of tubes behind the head arranged 

 in fan-shape. 



Total length 15|, snout to vent 7l, and greatest width 11 inches. An 

 adult female measured 23 inches in greatest width. 



Back brown; lower surfaces white. 



La Plata River, Station 321, 13 fathoms. 



Raia lima. 



Raia lima Poeppig, 1835, Reise in Chili, 1, p. 148; Dum^ril, 1865, Elasm., p. 553; Philippi, 1892, 



An. Mus. nac. Zool., 1, Chile, p. 2 extra, pi. 1, f. 3; Delfin, 1901, Cat. peces Chile, p. 23. 

 Raia chilensis Steindachner, 1898, Zool. jahrb. Suppl., 4, p. 332, pi. 21, f. 15. 

 Raia bUrgeri Delfin, 1902, Rev. Chil., 6, p. 267, pi. 12. 

 Raia steindachneri FowhER, 1910, Proc. Acad. nat. sci. Phil., 62, p. 468. 



Disk rhomboid, broader than long, blunt angled in front; snout slightly 

 produced; anterior margins waved, nearly straight, little concave in the middle, 

 outer angles blunted, hinder angles and margins broadly rounded. Lateral 

 teeth blunt, median sharper. Outer edges of nostrils distant from end of snout 

 one and one half times their distance from one another. A band of small spines 

 along the middle part of the forward margins of the pectorals, opposite the eyes; 

 top of head rough with minute spines, a larger spine in front of and another 

 behind each eye, a vertebral row of small tubercles on the middle of the body, 



