RATA CASTELNAUI. 301 



Back greyish violet, with rounded or oval greyish yellow spots, some of 

 which are surrounded by a dark ring. 



Total length 48.2, length' of disk 29.5, length of tail 21, and greatest width 

 33 cm. 



Another specimen somewhat larger, a male, had deeper concaves in the 

 anterior margins, which were more sinuous, and had a group of larger spines on 

 the front portion of each pectoral. Its total length was 60.3, length of tail 

 27.3, and width of disk 40.5 cm. 



Punta Arenas, Magellan's Strait. 



Raia flavirostris. 



Raia flavirostris Philippi, 1892, An. Mus. nac. Zool., 1, Chile, p. 3, extra, pi. 1, f. 2. 

 Raia oxyptera Philippi, 1892, ibid., p. 4, pi. 2, f. 1. 

 Raia latastei Delfin 1902, Rev. Chil., 6., p. 264, pi. 11. 



Disk rhomboid, wider than long, front angle acute, outer not rounded, front 

 margins undulate, indented, hinder margins and angles broadly rounded. Snout 

 nearly one third of the length of the body, acute. Teeth in about 40 rows. 

 Tail less than half the total length. Back roughened by small spines, larger on 

 the head and the margins of the pectorals. Three rows of tubercles on the tail, 

 median row originating farther forward than the others. Philippi's figure of 

 the type, a female 30 inches in length, shows five or six small tubercles at each 

 side of the abdomen and three more on each ventral. Probably to be placed 

 with R. patagonica. 



Raia oxyptera, described from an adult male of about 42 inches, has 38 rows 

 of teeth, three rows of tubercles on the tail, with coarse spines above the rostral 

 ridges, in a group in front of each eye and in another group opposite the eye on 

 each pectoral margin, in addition to the tenacula near the middle of the pectoral 

 and the claspers. Excepting, possibly, the spines on the abdomen and the 

 ventrals, which may be peculiar to an individual, a sex, or a species, the differ- 

 ences in the types described as R. flavirostris and R. oxyptera do not appear greater 

 than may be accounted for by difference in sex and age. 



Coast of Chile. 



Raia castelnaui. 



Raia agassizii var. meta Ribeiro, 1904, Pescas do "Annie," p. 20. 



Raia agassizii var. pida Ribeiro, 1904, Pescas do "Annie," p. 19. 



Raia castelnaui Ribeiro, 1907, Arch. Mus. nac, 14, p. 177, pi. 15. 



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



Width of disk less than three fourths of its length; front angle nearly 100°; 

 snout pointed, not produced; anterior margins sinuous; outer angles blunted; 



