n6 DISCOVERY REPORTS 



The laterals alone vary slightly in that those of helicoides, anderssoni and rossiana are tricuspid and those 



of aureolutea bicuspid. The Antarctic members range in height between 6 (georgianus) and 30 mm. 



{aureolutea). 



Amauropsis anderssoni (Strebel) PI. X, figs. 58, 59 



Natica anderssoni Strebel, 1906, p. 142, pi. 11, fig. 67 a, b. 

 Natica anderssoni Strebel, 1908, p. 61, pi. 5, fig. 64a, b. 



Type locality. Falkland Is. 

 St. 27. West Cumberland Bay, South Georgia, 3-3 miles S 44 E of Jason Lt, 15 Mar. 1926, no m. 

 St. 30. West Cumberland Bay, South Georgia, 2-8 miles S 24 W of Jason Lt., 16 Mar. 1926, 251 m. 

 St. 39. East Cumberland Bay, South Georgia, from 8 cables S 81° W of Merton Rock to 1-3 miles N 70 E of 



Macmahon Rock, 25 Mar. 1926, 179-235 m. 

 St. 42. Off mouth of Cumberland Bay, South Georgia, 1 Apr. 1926, 120-204 m. 

 St. 123. Off mouth of Cumberland Bay, South Georgia, 15 Dec. 1926, 230-250 m. 

 St. 1941. Leith Harbour, South Georgia, 29 Dec. 1936, 55-22 m. 



St. MS 68. East Cumberland Bay, 17 miles S \° E to 8i cables SE x E of Sappho Point, 2 Mar. 1925, 220-247 m. 

 St. WS 32. Mouth of Drygalski Fjord, South Georgia, 21 Dec. 1926, 91-225 m. 

 St. WS. 62. Wilson Harbour, South Georgia, 19 Jan. 1927, 15-45 and 26-83 m. 



Range. Falkland Is. and South Georgia, 20-310 m. 



The ' Discovery ' material is identical with examples examined from the Swedish South Polar 

 Expedition's St. 34, off Cumberland Bay, South Georgia, 252-310 m., but I have not seen Falkland 

 examples. 



Dentition. Fig. J, 44, p. 192. 



Amauropsis aureolutea (Strebel) 



Natica aureolutea Strebel, 1908, p. 63, pi. 5, fig. 63a, b. 



Type locality. South Georgia, 24-52'm. 

 St. 140. Stromness Harbour to Larsen Point, South Georgia, 54 02' S, 36 38' W to 54 11' 30" S, 36 29' W, 



23 Dec. 1926, 122-136 m. 

 St. 159. North-east of South Georgia, 53 52' 30" S, 36° 08' 00" W, 21 Jan. 1927, 160 m. 

 St. 170. Off Cape Bowles, Clarence Is., 6i° 25' 30" S, 53 46' 00" W, 23 Feb. 1927, 342 m. 

 St. 363. 2-5 miles S 8o° E of south-east point of Zavodovski I., South Sandwich Is., 26 Feb. 1930, 329-278 m 

 St. WS 177. Off south-east of South Georgia, 54 58' S, 35 00' W, 7 Mar. 1928, 97 m. 



Range. South-west of Snow Hill I., 64 36' S, 57 42' W, 152 m. (Strebel); Clarence Is., South 

 Sandwich Is. and South Georgia, 24-342 m. 



The ' Discovery ' material is identical with examples examined from the Swedish South Polar Expedi- 

 tion's St. 6, south-west of Snow Hill Island, 125 m. The species differs from anderssoni in having 

 a brighter epidermis which is orange brown, subobsolete spiral ridges, and in being larger with a taller 

 spire. The apical whorls are almost invariably eroded. 



The largest ' Discovery ' example is 27 mm. in height and 24 mm. in diameter (St. WS 177). Strebel 's 

 type is 14-9 x 14-2 mm. 



Dentition. Fig. J, 42, p. 192. 



Amauropsis rossiana Smith 



Amauropsis rossiana Smith, 1907a, p. 5, pi. 1, figs. 6, 6a. 

 Amauropsis rossiana Smith, 1915, p. 69. 

 Pellilitorina rossiana Hedley, 191 6, p. 52. 

 Amauropsis rossiana Eales, 1923, pp. 19, 21, fig. 21. 



