26 DISCOVERY REPORTS 



tail or nearer to the former. Snout with a small rounded projection, its length about 

 \ width of disc ; interorbital width equal to or a little greater than longitudinal diameter 

 of eye ; length of eye + spiracle if (young) to about 3 in that of snout. Internasal width 

 if to z\ in praeoral length of snout. Mouth nearly straight ; teeth with pointed crowns, 

 often worn so that the teeth appear flat ; 22 to 34 rows in the upper jaw. Upper surface 

 of disc with numerous very small spinules, concentrated especially on the anterior parts 

 of the pectoral fins, on the snout, round the eyes, and on the back; in females, and, to 

 a lesser extent in males, there are often numerous spinules on the hinder parts of the 

 pectorals; no ocular or scapular spines; a median series of 12 to 18 strong, sharply 

 pointed, backwardly curved spines, usually extending from opposite the hinder parts of 

 the pectorals to the first dorsal fin; a row of 1 to 5 similar spines on the nuchal and 

 suprascapulary regions, usually separated by a wide gap from the main series, but 

 sometimes extending posteriorly to unite with it ; very occasionally these anterior median 

 spines are absent ; an area of small spinules, similar to those covering the disc, on each 

 side of the upper surface of the tail; mature males with 2, 3, or more series of alar 

 spines. Lower surface quite smooth. Dorsal fins close to end of tail, generally separated 

 by a spine. Brownish ; often with indistinct paler spots of various sizes, some of them 

 margined with dark brown, scattered over the disc; the most conspicuous marking is 

 an ocellus on the hinder part of the base of each pectoral, which may be yellow or white, 

 margined with brown or black, and is sometimes very clear, sometimes faint, and 

 sometimes represented by a faint dark ring; this ocellus may be absent altogether; 

 sometimes a pair of white or yellow spots on the upper surface of the anterior half of 

 the tail, nearly united in the middle line ; lower surface of the disc uniformly yellow 

 or white, that of the tail sometimes with irregular dusky spots. 



Hab. Argentina(P); Patagonian-Falklands region; Straits of Magellan, and west of 

 them. 



In addition to the above, I have included the two types collected by the ' Challenger ' 

 at Stns. 313 and 314 in the description. One of these is a male, 693 mm. in total length 

 (width of disc 470 mm.), the other a female, 826 mm. long (width of disc 635 mm.). 



Raja griseocauda, sp.n. 



St. WS 218. 2. vi. 28. 45°45'S, 59° 35' W. Commercial otter trawl, 311-247 m.: 1 male 

 specimen, 255 mm. (width of disc 180 mm.). 



St. WS 236. 6. vii. 28. 46'55'S, 6o° 40' W. Commercial otter trawl, 272-300 m.: 2 male 

 specimens, 320, 322 mm. (width of disc 220, 230 mm.). 



St. WS 250. 20. vii. 28. 5i°45'S, 57 00' W. Commercial otter trawl, 313-251 m.: 1 male 

 specimen, 290 mm. (width of disc 200 mm.). 



St. WS 817. 14. i. 32. 52" 23' S, 6419'W. Commercial otter trawl, 202-238 m.: 1 female 

 specimen, 460 mm. (width of disc 330 mm.). Holotvpe. 



St. WS 824. 19. i. 32. 52 29' 15" S, 58 27' 15" W. Commercial otter trawl, 146-137 m. : 1 male 

 specimen, 250 mm. (width of disc 175 mm.). 



Closely related to R. brachynrops, but with the vent nearly always nearer to tip of 

 snout than to end of tail. Length of snout \ or rather more than \ width of disc; 

 length of eye + spiracle z\ to z\ in that of snout. Teeth rather smaller; 30 to 36 rows 



