122 DISCOVERY REPORTS 



Genus Clavulina, d'Orbigny, 1826 



247. Clavulina communis, d'Orbigny (SG 165). 



Twenty-three stations : 360, 373, 382-6; WS 199, 201, 203, 204, 377, 400, 403, 468, 469, 471, 472, 

 474.495. 502, 517. 555- 



Found in all areas in deep water between 2552 and 4773 m., and common at Sts. 

 WS 199, 403, 474, 517 and 555. As usual, megalospheric specimens are most frequent. 

 At some stations the megalospheric young in the triserial condition are abundant, and 

 but for the presence of adult specimens might easily be mistaken for Verneuilina sp. 

 The general type all over the region is very finely arenaceous, with a smooth, light grey 

 test exhibiting no signs of segmentation externally, similar to those figured in the South 

 Georgia report (pi. iii, figs. 39-42). The constituents are very minute, apparently Radio- 

 larian and diatom debris. 



At St. WS 474, and occasionally elsewhere, in addition to the smooth type, specimens 

 occur in which the test is firmer through the presence of more cement, and the uniserial 

 segments are distinct. At Sts. 385 and WS 204 a few young individuals in the triserial 

 stage were found, very much larger than usual, and constructed of mineral grains of 

 appreciable size. It is possible that they represent the young of another species of which 

 no adult specimens were found. 



Cushman, in his revision of some long-established genera, has made C. commimis 

 d'Orbigny the type of a new genus Martinottiella (C. 1925, etc., LFR, 1933, p. 37, 

 pi. iv, figs. 6-8). I do not see the necessity for the distinction. 



Sub-family VALVULININAE 

 Genus Valvulina, d'Orbigny, 1826 



248. Valvulina conica, Parker and Jones (F 122). 

 Two stations: 360, 384. 



Extremely rare at both stations. 



249. Valvulina fusca (Williamson). 



Rotalinafusca, Williamson, 1858, RFGB, p. 55, pi. v, figs. 114, 115. 

 Valvulina fusca, Brady, 1884, PC, p. 392, pi. xlix, figs. 13, 14. 

 Valvulina fusca, Cushman, 1918, etc., FAO, 1922, p. 63. 



Seven stations: 383 ; WS 201, 400, 403, 468, 499, 517. 



Family frequent at St. WS 517 in the Bellingshausen Sea, 2770 m.; very rare at the 

 other stations. 



Family BULIMINIDAE 



Sub-family BULIMININAE 



Genus Buliminella, Cushman, 191 1 



250. Buliminella seminuda (Terquem) (F 136) (SG 172). 

 Two stations: 175 ; WS 482. 



Rare at both stations, which are in the Bransfield Strait, but the species is well repre- 



