LAGENIDAE 143 



(S. 1912, etc., LSP, 1912, pi. XX, fig. 9). At St. 386 the same form occurs in a trigonal 

 variety. At Sts. 384, 385 and WS 403 a compressed and carinate form, with a long neck 

 connected by a wing with the body of the shell, has auricles extending right across the 

 base, rather like the specimen figured by Millett (M. 1898, etc., FM, 1901, p. 625, 

 pi. xiv, fig. 15). A second specimen at St. 384 is entosolenian, cordate in form, broadest 

 at the base, which is flattened, the auricles being indicated only by white patches con- 

 trasting with the glassy shell. And finally at St. 383 a very elongate specimen resembling 

 another figure by Sidebottom (S. 1912, etc., LSP, 1913, pi. xvii, fig. 22). Its attribution 

 to L. oiiriciilata seems open to doubt. Sidebottom says that the " loops at the base are 

 feebly represented ". In his figure they appear to be external markings only, and they are 

 such in my specimen. 



311. Lagena auriculata var. arcuata, Sidebottom. 



Lagena auriculata var. nov. arcuata, Sidebottom, 1912, etc., LSP, 1912, p. 421, pi. xx, figs. 

 19, 20; 1913, p. 200. 



Two stations : 385 ; WS 204. 



A single excellent specimen at St. 385 and two equally good at St. WS 204. Both 

 stations are in deep water, 3638 and 3328 m. respectively, within but very near the 

 Antarctic convergence line. 



312. Lagena auriculata var. costata, Brady. 



Lagena auriculata var. costata, Brady, 1879, etc., RRC, 1881, p. 61 ; 1884, FC, p. 487, pi. Ix, 



fig- 38. 



Lagena auriculata var. costata, Cushman, 1910, etc., FNP, 1913, p. 32, pi. xiv, fig. 2. 



Lagena auriculata var. costata, Sidebottom, 1912, etc., LSP, 1912, p. 422, pi. xx, figs. 21, 22; 



1913, p. 200. 



One station: 385. 



A single specimen from 3638 m. in the Drake Strait just inside the convergence. It is 

 longer and more finely striate than Brady's type, and closely resembles Sidebottom's 

 fig. 21 {lit supra). 



313. Lagena basireticulata, sp.n. (Plate VI, figs. 39, 40). 

 Three stations: 384; WS 468, 469. 



Test nearly globular, the upper half smooth and devoid of ornament, the lower half 

 covered with strong costae which at the base merge and form strong hexagonal pits. 

 Oral extremity obtuse and flattened with central aperture. 



Length 0-3 mm.; breadth and thickness about the same. 



Only a single specimen from each station, all of which are in deep water (4344- 

 3713 m.) and on both sides of the Antarctic convergence line. 



The species resembles L. semimida in the hexagonal ornament of its basal portion, 

 but has also the costae characteristic of L. exsculpta, which has no basal ornament. 



314. Lagena biancae (Seguenza) (F 210) (SG 202). 



Twenty-five stations: 170, 175, 192, 195, 196B, 198, 200, 363, 383-6; WS 204, 205, 384, 385, 403, 

 468, 469, 481, 482, 487, 498, 506, 507B. 



