I2 4 DISCOVERY REPORTS 



Type locality. Gauss Station, Davis Sea. 



St. 1660. Ross Sea, 74 46-4' S, 178 23-4' E, 27 Jan. 1936, 351 m. 

 Range. McMurdo Sound, 300 fathoms (Smith, 1915); Adelie Land, 288 fathoms (Hedley, 1916). 



Dentition. Thiele (1912). 



Unfortunately, Melvill & Standen (191 2, 26 August) used the same combination ' Trichotropis 

 antarctica' for a different shell from Burdwood Bank in 56 fathoms, but they subsequently (1916) 

 renamed it Trichotropis brnceana. Melvill & Standen's shell is in very poor preservation, and the figure 

 suggests an immature Trophon (Xymenopsis) rather than a Trichotropis. 



Antitrichotropis wandelensis (Lamy) 



Lacuna wandelensis Lamy, 1907, p. 5, pi. 1, figs. 5-7. 

 Lacuna wandelensis Melvill & Standen, 1912, p. 349. 



Type locality. Wandel I., Palmer Archipelago. 



St. 175. Bransfield Strait, South Shetlands, 63 17' 20" S, 59 48' 15" W, 2 Mar. 1927, 200 m. 



St. 195. Admiralty Bay, King George I., South Shetlands, 62 07' S, 53 28' 30" W, 30 Mar. 1927, 391 m. 



Only one example from each of the above stations. They are minus the animal, but the epidermis 

 is well preserved and shows odd tufts of hair-like processes disposed at regular intervals on the carinae. 

 Lamy's type is evidently denuded of epidermis. 



Range. Recorded also from Scotia Bay, South Orkneys, 9-10 fathoms (Melvill & Standen, 191 2). 



Genus Trichoconcha Smith, 1907 



Type (monotypy): T. mirabilis Smith, 1907 



Trichoconcha mirabilis Smith 



Trichoconcha mirabilis Smith, 1907, p. 6, pi. 1, figs. 7, "jb. 

 Torellia (Trichoconcha) mirabilis Thiele, 1912, p. 197. 

 Torellia (Trichoconcha) mirabilis Smith, 1915, p. 68. 

 Trichoconcha mirabilis Hedley, 19 16, p. 50. 

 Trichoconcha mirabilis Eales, 1923, p. 14. 



Type locality. Off Coulman I. in 100 fathoms. 



St. 123. Off mouth of Cumberland Bay, South Georgia. From 4-1 miles N 54 E of Larsen Point to 1-2 miles S 



62 W of Merton Rock, 15 Dec. 1926, 230-250 m. 

 St. 140. Stromness Harbour to Larsen Point, South Georgia. From 54 02' S, 36 38' W to 54 n'3o"S, 



36 29' W, 23 Dec. 1926, 122-136 m. 

 St. 144. Off mouth of Stromness Harbour, South Georgia. From 54 04' S, 36° 27' W to 53 58' S, 36 26' W, 



5 Jan. 1927, 155-178 m. 

 St. 148. Off Cape Saunders, South Georgia. From 54 03' S, 36 39' W to 54 05' S, 36 36' 30" W, 9 Jan. 1927, 



132-148 m. 

 St. 149. Mouth of East Cumberland Bay, South Georgia. From 1-15 miles N 76^° W to 2-62 miles S 1 1° W of 



Merton Rock, 10 Jan. 1927, 200-234 m - 



Range. Coulman I., Ross Sea (Smith); Commonwealth Bay, 350-400 fathoms; and off Mertz 

 Glacier Tongue, Adelie Land, 157 fathoms; Drygalski I., Davis Sea (Hedley); Gauss Station (Thiele); 

 South Georgia, 122-250 m. ('Discovery'). 



The ' Discovery ' records extend the range of this species to more than half the circumference of the 

 Antarctic continent. 



Major diameter 29 mm.; minimum diameter 20-5 mm.; height 19 mm. (holotype). 



Major diameter 42 mm. ; minimum diameter 31-0 mm. ; height 31 mm. (St. 42). 



Dentition. Figured by Eales (1923, loc. cit. p. 15, fig. 12). 



