I2 DISCOVERY REPORTS 



Hab. Coasts of Argentina, Patagonia, Chile and Peru. 



This species, which was previously unrepresented in the British Museum collection, 

 appears to range from the mouth of the Rio Plata to the middle of the coast of Peru. 

 In addition to the above, I have received a female, 320 mm. long, from Buenos Aires 

 (Marini), and a male of 410 mm. and 2 females of 270 and 320 mm. from Coronel, 

 Chile (Cavendish Bentinck). 



RAJIDAE 



A large series of specimens of Raja and Psammobatis was obtained during the trawling 

 surveys, and, except for one of the new species of Raja, which is based upon a single 

 example, each species is represented by a fairly good range of material. The following 

 egg-capsules and embryos are indeterminable and may belong to either genus : 



St. WS 233. 5. vii. 28. 49 25' S, 59 45' W. Commercial otter trawl, 185-175 m.: 1 egg-capsule. 



St. WS 583. 2. v. 31. 53 39' S, 70" 54' 30" W. Small beam trawl, 14-78 m.: 2 egg-capsules, 



2 embryos. 



St. WS764. 17. x. 31. 44°38'45"S, 6i°49'3o"W. Commercial otter trawl, 110-104111.: 



1 egg-capsule. 

 St. WS776. 3. xi. 31. 46°i8'i5"S, 65° 02' 15" W. Commercial otter trawl, 107-99 m.: 



1 embryo. 



St.WS787. 7. xii. 31. 48 44' S, 65 24' 30" W. Commercial otter trawl, 106-1 10 m.: 1 embryo. 



St. WS 800. 21-22. xii. 31. 48° 15' 45" S, 62 09' 52" W. Commercial otter trawl, 139-137 m.: 

 1 embryo. 



St. WS 805. 6. i. 32. 50 10' 15" S, 63 29' W. Commercial otter trawl, 148 m.: 2 embryos. 



St. WS 825. 28-29. i. 32. 50 50' S, 57° 15' 15" W. Commercial otter trawl, 135-144 m.: 

 1 embryo. 



Revision of the Patagonian species of Raja 



Key to the species 1 



I. Terminal parts of lateral line tubules on lower surface pigmented, appearing as small 

 blackish spots and streaks; snout long, acutely pointed, length 3 J to 3! (2f to 3J in young) 

 times eye + spiracle; vent much nearer end of tail than tip of snout; a single large nuchal 



spine flavirostris. 



II. No pigment spots or streaks on lower surface; snout shorter, not acutely pointed, length 

 never more than 2I times eye + spiracle. 



A. One to three pairs of enlarged scapular spines; spines scattered over disc of moderate 

 size and fairly well separated; a continuous series of median spines from nuchal region 

 to first dorsal fin. 



1 . Ocular spines and median spines on disc and tail very strong, ribbed ; spines scattered 

 over disc rather large, with stellate bases ; 1 2 to 1 5 median spines on back ; mixopterygia 

 short, stout doello-juradoi. 



2. Ocular spines and median spines on disc and tail smaller, not ribbed; spines scattered 

 over disc smaller, without distinctly stellate bases; 25 to 42 median spines on back; 

 mixopterygia rather long, slender. 



a. Small spines scattered over greater part of disc; eye + spiracle if to if in length 



of snout macloviana. 



1 I am unable to place R. cynosbatus from the published description (Philippi, 1896, An. Univ. Chile, 

 xcin, p. 385). The type was a male, 500 mm. long (width of disc 310 mm.). 



