LAGENIDAE 141 



469. At Sts. 383 and 386 an inflated but short-spined form resembling Cushman's 

 figure (C. 1910, etc., FNP, 1913, p. 6, pi. xxxviii, fig. 6) occurs. This variety incidentally 

 is much nearer to L. sacculus, Fornasini (L. acuta, Reuss var. saccidus, F. 1901, NNI, 

 p. 49, fig. 3) than the specimens figured by Cushman {ut supra, p. 8, pi. iii, figs. 1-3) 

 under that name. Vide post No. 370. 



302. Lagena acuticosta, Reuss (F 196) (SG 197). 



Twelve stations: 170, 175, 190, 383-6; WS 204, 205, 403, 469, 482. 



Rare or very rare at all stations, but generally typical and well developed. The best 

 and largest specimens at Sts. 175 and WS 482, both of which are in moderate depths. 

 Some of the specimens at St. WS 482 have circular holes in the test, evidently bored by 

 some other organism in search of food. At the deeper stations the specimens are gener- 

 ally small and variable. 



303. Lagena alveolata, Brady. 



Lagefia alveolata, Brady, 1884, FC, p. 487, pi. Ix, figs. 30, 32. 



Lagma alveolata, Cushman, 1910, etc., FNP, 1913, p. 33, pi. xviii, fig. i. • 



Lagena alveolata, Sidebottom, 1912, etc., LSP, 1912, p. 424, pi. xxi, figs, i, 2; 1913, p. 202, 

 pi. xviii, figs. II, 12. 



Five stations: 384, 385, 386; WS 468, 469. 



The species is very rare and confined to deep-water stations in the Drake Strait, 

 mostly outside the Antarctic convergence line. The depths range between 3638 and 

 4773 m. The specimens are variable and agree only in the possession of the four 

 basal loops which mark the species. At St. WS 469 the single specimen is of the very 

 distinctive form figured by Sidebottom (S. 1912, etc., LSP, 1912, p. 424, pi. xxi, fig. 2). 



304. Lagena alveolata var. caudigera, Brady. 



Lagena alveolata var. caudigera, Brady, 1884, FC, p. 488, pi. ix, fig. 25. 



? Lagena alveolata var. caudigera, Sidebottom, 1912, etc., LSP, 1912, p. 424, pi. xxi, fig. 4. 



One station: 386. 



A single specimen only from 4773 m. in the Drake Strait, and outside the Antarctic 

 convergence line. It differs from Brady's figure and description to some extent, having 

 shorter basal spines and being devoid of the beaded lines near the base. Sidebottom's 

 figure shows more numerous spines than Brady's or my specimens. 



305. Lagena alveolata var. separans, Sidebottom (F 246). 

 Three stations: 201, 383, 386. 



Extremely rare and very small compared with the specimens from the Falklands area. 

 It is a Pacific form and did not figure in the South Georgia report. Two of the stations 

 are in the Drake Strait, and the remaining St. 201 is in the Bransfield Strait, to which 

 area the influence of Pacific water extends. 



306. Lagena alveolata var substriata, Brady (SG 198). 

 Six stations: 384-6; WS 204, 403, 468. 



This typically Pacific form occurs only at very deep-water stations in the Drake Strait 



