156 DISCOVERY REPORTS 



St. 39. East Cumberland Bay, South Georgia, 179-235 m., grey mud, 2 specimens. 



St. 42. Off mouth of Cumberland Bay, South Georgia, 120-204 "!•' 4 specimens. 



St. 45. 27 miles south-east of Jason Light, South Georgia, 283-270 m., grey mud, i specimen. 



St. 123. Off mouth of Cumberland Bay, South Georgia, 230-250 m., grey mud, 4 specimens. 



St. 141. East Cumberland Bay, South Georgia, 17-27 m., i specimen. 



St. 148. Off Cape Saunders, South Georgia, 132-148 m., grey mud and stones, 4 specimens. 



St. 149. Mouth of East Cumberland Bay, South Georgia, 200-234 m., mud, i specimen. 



St. 156. South Georgia, 53° 51' S, 36° 21' 30" W, 200-236 m., rock, 7 specimens. 



St. 159. South Georgia, 53° 52' 30" S, 36° 08' W, 160 m., rock, 39 specimens. 



St. 160. Near Shag Rocks, 53° 43' 40" S, 40° 57' W, 177 m., grey mud, stones and rock, 9 speci- 

 mens. 



St. 170. Off Cape Bowles, Clarence Island, 61° 25' 30" S, 53" 46' W, 342 m., rock, 10 specimens. 



St. 175. Bransfield Strait, South Shetlands, 63° 17' 20" S, 59° 48' 15" W, 200 m., mud, stones, 

 gravel, i specimen. 



St. 181. Schollaert Channel, Palmer Archipelago, 64° 20' S, 63" 01' W, 160-335 n^-- niu<J' 

 I specimen. 



St. 187. Neumayr Channel, Palmer Archipelago, 64° 48' 30" S, 63° 31' 30" W, 259 m., mud, 

 4 specimens. 



St. 190. Bismarck Strait, Palmer Archipelago, 64° 56' S, 63° 35' W, 93-130 m., rock or stones and 

 mud, 3 specimens. 



St. 366. 4 cables south of Cook Island, South Sandwich Islands, 77-152 m., 2 specimens. 



St. 371. I mile east of Montagu Island, South Sandwich Islands, 99-161 m., i specimen. 



St. 456. I mile east of Bouvet Island, 40-45 m., 9 specimens. 



St. 1562. Marion Island, 46° 52' S, 37" 55' E, 97-104 m., 3 intermediate specimens. 



St. 1652. Ross Sea, 75° 56-2' S, 178° 35-5' W, 567 m., 2 specimens. 



St. 1660. Ross Sea, 74° 46-4' S, 178° 23-4' E, 351 m., 2 specimens. 



St. 1952. Between Penguin Island and Lion's Rump, King George Island, South Shetlands, 

 367-383 m., I specimen. 



St. WS 25. Undine Harbour (North), South Georgia, 18-27 "i-i rn^id, sand, 5 specimens. 



St. WS 62. Wilson Harbour, South Georgia, 15-45 m., 2 specimens. 



St. WS 65. Undine Harbour (North), South Georgia, shore collection, i specimen. 



St. MS 74. East Cumberland Bay, South Georgia, 22-40 m., i specimen. 



Of the 118 specimens, 36 have R between 30 and 65 mm. and may reasonably be 

 regarded as aduh. Nine specimens from St. 456, Bouvet Island, have a few short 

 tubercles scattered along the radial series of plates, or restricted to the outer half of ray 

 where they may occur also on either side of the radial series. All the others, from South 

 Georgia, the Antarctic Archipelago, and Ross Sea, have a perfectly smooth abactinal 

 surface, although imbedded in the skin are a variable number of delicate spinelets which 

 are clearly visible only when the specimen is dried. These spinelets are extremely 

 numerous in the Bouvet Island specimens, occurring on the papular areas as well as 

 plates. They never occur on the actinal surface. They appear to be a normal character of 

 glabra, although they are sometimes very small and restricted to the lateral parts of the 

 abactinal area. In small and medium-sized alcoholic specimens in which the membrane 

 is usually thinner than in the adult the spicules, if very numerous, are often visible under 

 a strong hand-lens, but become conspicuous only when dry, giving the abactinal surface 

 a finely spiculate texture. 



Sladen's Porania spiculata therefore appears to be a normal specimen oi glabra. 



