152 DISCOVERY REPORTS 



348. Lagena heronalleni, sp.n. (Plate VI, figs. 55-57). 



Lagena striato-punctata {pars), Heron-Allen and Earland, 1922, TN, p. 149, pi. vi, figs. 5, 19. 



Four stations : 170, 175, 195; WS 482. 



Test large, flask-shaped, with a short stout neck tapering into the body which is 

 ornamented with a variable number (up to 20 or more), of broad and flattened costae 

 which are divided by cross-bars into rectangular pits. The whole surface of the rib is 

 covered in with a thin membranous shell, converting the pits into cells. The costae run 

 up into the neck, and the intervals between the costae are filled with a spongy white shell 

 substance which contrasts with the dark hyaline ribs. In worn and abraded specimens 

 the outer covering of the costae disappears, and the ribs stand up from the body of the 

 test, covered with large pits. 



Length about o-6o mm.; maximum breadth and thickness about 0-35 mm. 



Very rare at all stations, which with one exception, St. 170 off" Clarence Island, 342 m., 

 are in the Bransfield Strait area, 100-391 m. 



This large and striking species was first discovered in 45-50 fathoms off Cape Adare 

 in the Ross Sea, and was included in the Terra Nova report among the varieties of 

 L. striato-punctata. But as a double-walled species it belongs to the same group as 

 L. scottii and L. texta, and I have named it after my collaborator in the Terra Nova and 

 other reports. 



349. Lagena hexagona (Williamson) (F 202) (SG 222). 

 Eight stations: 170, 175, 177, 363, 383, 385, 386; WS 469. 



Very rare everywhere, but remarkably fine and typical specimens especially at the 

 deep-water stations in the Drake Strait. Here the walls of the hexagonal pits are very 

 high, reaching their maximum in a single specimen at St. 385, in which the high walls 

 tend to have spinous fringes, particularly round the basal hexagons. Sidebottom refers 

 to a similar variation in the south-west Pacific (S. 1912, etc., LSP, 1913, p. 172). 



350. Lagena hispida, Reuss (F 181). 

 Four stations : 384, 385 ; WS 497, 509. 



Only a single specimen at each station. That from St. 384 is a large specimen of the 

 type figured in the Falklands report (pi. x, fig. 7) in perfect condition, the external 

 coating being unbroken, and only the neck exhibiting the spines. The specimen from 

 St. WS 509 is pyriform with short spines. 



351. Lagena hispidula, Cushman (F 180) (SG 223) (Plate VI, figs. 58-60). 

 Seventeen stations: 170, 175, 177, 190, 363, 383-6; WS 204, 403, 468, 469, 507 a, 507B, 515, 517. 

 Frequent and very varied at St. WS 403, where the specimens range from globular to 



narrowly cylindrical, all being provided with very long necks. Rare or very rare at the 

 other stations. At St. 170 the flask is globularwith producedneck, whileatSts. WS507A, 

 507 B and 515 the flask is narrow and cylindrical, which form seems more usual in the 

 higher latitudes. Cushman 's figures do not give any idea of the range of form, which is 

 quite as variable as in L. laevis. The depth ranges between 329 and 4773 m., but the 

 finest specimens were found at the deeper stations. 



