i66 DISCOVERY REPORTS 



Its normally triangular shape is noteworthy, as it is almost unknown in the genus, if we 

 except the abnormal trigonal condition occasionally assumed by many compressed species 

 of Lagena. It is of particular interest therefore to record the occurrence at St. 175 of an 

 abnormal specimen ofL.^ex/a, a compressed individual with two faces only, thus reversing 

 the usual lines of variation. A specimen with four faces was found at the same station. 



From its occurrence at points almost diagonally opposite on the coastline of Antarctica, 

 the species may probably have a circumpolar distribution. 



408. Lagena torquata, Brady (Plate VI, fig. 43). 



Lagena torquata, Brady, 1879, etc., RRC, 1881, p. 62; 1884, FC, p. 469, pi. Iviii, fig. 41. 

 Lagena torquata, Cushman, 1910, etc., FNP, 1913, p. 27, pi. xi, fig. 3. 



Two stations: 385, 386. 



A single large but rather weakly marked specimen from St. 386, 4773 m., and two 



good specimens from St. 385, 3638 m., both in the Drake Strait. 



409. Lagena ventricosa, A. Silvestri (SG 249) (Plate VII, figs. 36, 37). 

 Eight stations: 384-6; WS 204, 205, 403, 468, 469. 



All the stations are in very deep water between 3328 and 4773 m. The specimens are 

 thick-walled, generally opaque, but at St. 385 there was a large and typical hyaline 

 specimen which exhibited an entosolenian tube attached and reaching almost to the 

 base of the shell. There is great variation in the size and development of the hood, which 

 appears to come into existence by the suppression of one side of a produced fissurine 

 mouth, the other side becoming more or less curv^ed. This origin seems to be confirmed 

 by the fact that many of the specimens, notably at Sts. 384, WS 204 and 469, are some- 

 what compressed, being inseparable, except for the developing hood, from specimens of 

 L. (Fissurina) globosa. These compressed specimens may be identical with L. {Ento- 

 solenia) margiiiata var. ventricosa (Wiesner, 193 1, FDSE, p. 120, pi. xix, fig. 222). 

 Wiesner describes his variety as nearly spherical, not much flattened at the sides, having 

 on the periphery a weak ring standing out more strongly at the apertural end. His 

 photographic figure is far from distinct. 



A single specimen from St. 384 is perhaps an exaggerated example of his variety. It is 

 pear-shaped, compressed, broadest at the base, which has a distinct carina not ex- 

 tending over the upper half of the test. The hood is greatly extended and flattened out. 

 We figure the specimen, which is very distinctive, but in the absence of others do not 

 consider it worth varietal distinction. 



410. Lagena vilardeboana (d'Orbigny) (F 191). 

 Two stations: 384, 385. 



A single weak specimen at each station. 



411. Lagena virgulata, Sidebottom (Plate VII, figs. 38, 39). 



Lagena laevigata, var.n. virgulata, Sidebottom, 1912, etc., LSP, 1912, p. 400, pi. xvii, fig. 8; 

 1913, p. 181, pi. xvi, fig. 6. 



Lagena acuta, var.n. virgulata, Sidebottom, 1912, etc., LSP, 1912, p. 401, pi. xvii, fig. 10; 

 1913, p. 182. 

 Five stations: 384-6; WS 204, 205. 



