LITUOLIDAE 83 



spirit from St. 177 in the Bransfield Strait (1080 m.). Fragments of much larger speci- 

 mens were found, notably one of four chambers measuring more than 6 mm. at St. 

 WS 495 in the Bellingshausen Sea (2582 m.). The specimen if complete and propor- 

 tionately built would probably have exceeded an inch in length. Such large individuals 

 however must be very rare, the average large specimen being about 6 mm., and even 

 such are in a minority, the species being represented at most stations by small specimens 

 and fragments of medium size. It is common at St. WS 507 a, frequent at Sts. 170, 175, 

 196, WS 506 and 507 b, more or less rare elsewhere. The length of the chamber as com- 

 pared with its breadth varies greatly. In small specimens the chambers are often very 

 long. 



146. Reophax bicameratus, sp.n. (Plate II, fig. 27). 

 One station: WS 507 B. 



Test composed of two elongate-oval chambers separated by a slight constriction of 

 the body of the test. Aboral end rounded, oral end produced to a blunt point bearing 

 the aperture. Sutural line between the chambers not distinguishable. Composed of 

 fine sand grains neatly cemented together to form a smooth but unpolished surface. 

 Colour pale yellow, darker round the niouth. 



Length i-2 mm.; greatest width and thickness 0-4 mm. 



Only a single specimen from 580 m. in the Bellingshausen Sea. It has all the ap- 

 pearance of a fully grown organism, but may prove to be an immature specimen. 



147. Reophax guttifer, Brady (Plate II, fig. 31). 



Reophax gutiif era, Brady, 1879, etc., RRC, 1881, p. 49; 1884, FC, p. 295, pi. xxi, figs. 10-15. 

 Reophax guttifer. Goes, 1894, ASF, p. 26, pi. vi, figs. 192-5. 

 Reophax guttifer, Cushman, 1918, etc., FAO, 1920, p. 13, pi. iii, fig. 7. 



Twelve stations : 177, 180, 181, 186, 369, 386; 64° 56' S, 64° 43' W; WS 395,490, 494 a, 507 a, 515. 



Not uncommon at Sts. 180 and 181 in the Palmer Archipelago, depth 160 m., where 

 some large specimens running up to six or seven chambers were found. Very rare else- 

 where, and usually of two or three chambers only, though single large specimens were 

 found at St. WS 515 and in the sounding from 64° 56' S, 64° 43' W. 



148. Reophax distans, Brady (SG 104). 



Seventeen stations: 170, 196, 385; WS 386, 468, 469, 471, 472, 474, 495, 497, 502, 503, 507B, 

 515. 517. 555- 



Fragments only of this fragile organism were found, never more than two chambers 

 attached to each other. Such fragments were common at St. WS 472, and frequent at 

 St. WS 474, both of which are in the deep water of the Scotia Sea. The other records 

 show a wide range between 342 and 4344 m., and are scattered over the entire area 

 between the Weddell and the Bellingshausen Seas. 



149. Reophax catenulatus, Cushman (Plate II, fig. 28). 

 Reophax catenulatus, Cushman, 1910, etc., FNP, 1910, p. 93, fig. 135. 



One station : WS 403. 



A single specimen, of two chambers only, from 3721 m. in the Drake Strait. The 



