SYSTEMATIC 113 



Length (4 whorls only) 8-5 mm. ; diameter 3-8 mm. (holotype). 

 Length (5! whorls only) 9-25 mm.; diameter 3-0 mm. (paratype). 



Type locality. St. 181. Schollaert Channel, Palmer Archipelago, 64 20' S, 63 01' W, 12 Mar. 

 1927, 160-335 m. 



The species is nearest related to Turritellopsis gratissima Thiele from Gauss Station, Davis Sea, 

 which has one spiral less per whorl. 



It is possible that my paratype of theilei is not identical with the holotype, but more material is 

 necessary to determine this. 



These Antarctic species seem to be correctly placed in Turritellopsis, the radula of which lacks 

 marginal teeth. Thiele (1912, pi. 15, fig. 23) figured the dentition of his T. gratissima, and this also 

 shows three teeth only, a central and a pair of laterals only. 



Genus Colpospirella n.g. 

 Type : Turritella algida Melvill & Standen 

 This is a very small Turritellid, apparently never more than 6 mm. in height, having a relatively 

 large, smooth, papillate protoconch of z\ whorls, the last with a blunt median keel. The protoconch is 

 very like that of the Australian Colpospira, but the labial profile is only moderately sigmoid, not deeply 

 sinused as in the Australian genus. 



Colpospirella algida (Melvill & Standen) 



Turritella algida Melvill & Standen, 1912, p. 352, pi. fig. 14. 

 Type locality. Burdwood Bank, south of the Falkland Is., 56 fathoms. 

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

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



15 Jan. 1927, 155-178 m. 

 St. WS 816. West of Falkland Is., 52 09' 45" S, 64 56' W, 14 Jan. 1932, 150 m. 

 St. WS 210. North of Falkland Is., 50 17' S, 6o° 06' W, 29 May 1928, 161 m. 

 St. WS211. 50 17' S, 6o°o6' W, 29 May 1928, 174 m. 

 St. WS 838. Between Falkland Is. and Patagonia, 53 11' 45" S, 65 W, 5 Feb. 1932, 148 m. 



Genus Mathilda Semper, 1865 

 Type : Turbo quadricarinata Brocchi, Pliocene, Italy 

 Mathilda malvinarum (Strebel) 



Cerithiopsis malvinarum Strebel, 1908, p. 49, pi. 1, fig. loa-c. 

 Type locality. Port Louis, Falkland Is., 1 m. 

 St. WS 225. North-west of Falkland Is., 50 20' S, 62 30' W, 9 June 1928, 162-161 m. 

 St. WS 243. Between Falkland Is. and Patagonia, 51 06' S, 64 30' W, 17 July 1928, 144-141 m. 



Family EULIMIDAE 

 Genus Balcis Leach, 1847 



Type: Balcis montagui ( = B. alba da Costa) 

 Balcis antarctica (Strebel) 



Eulirna antarctica Strebel, 1908, p. 65, pi. 6, fig. qia-c. 

 Type locality. South-east of Seymour I., 64 20' S, 56 38' W, 150 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. 

 Melvill & Standen (1912, p. 352) ascribed to this species an immature example from Burdwood 



Bank in 56 fathoms, but the record requires confirmation. 



9-2 



