LITUOLIDAE 8i 



both rough and smooth specimens were found. At many of the Bransfield Strait 

 stations the tests are built of black scoriae, giving an exceptionally rough appearance. 



138. Reophax fusiformis (WiUiamson) (F 83) (SG 99). 



Twenty-six stations : 167, 169, 171, 177, 180, 192, 195, 198, 200, 202, 209; 62° 57' S, 60° 20' 3o"W; 

 WS 383-6, 389, 395, 472, 476, 479, 482, 483, 485, 515, 517. 



Widely distributed but generally rare. It is however very common at St. WS 479 in 

 1523 m., and of frequent occurrence at Sts. 209, WS 384 and 483 ; the best examples 

 were found at St. 209. 



139. Reophax communis, Lacroix (Plate II, figs. 29, 30). 

 Reophax communis, Lacroix, 1930, LPCM, p. 4, text-figs. 5-7. 



Seven stations: 360, 373 ; WS 469, 474, 495, 516, 517. 



The few records are confined to deep water in the Scotia and Bellingshausen Seas, 

 between 2515 and 3959 m., and except at St. 360, where it is not uncommon, and WS 5 16, 

 where it is rare, only one or two specimens were noted at each station. In the Mediter- 

 ranean, from which it was first described, and in British seas, the species is found in 

 comparatively shallow water, and owing to its minute size it may have been overlooked 

 at other Discovery stations. 



140. Reophax dentaliniformis, Brady (F 84) (SG loi) (Plate II, figs. 32 35). 



Sixty-four stations : 167, 169, 171, 175, 177, 180, 181, 186, 187, 191, 192, 194, 196, 202, 206, 209, 

 360, 362, 363, 365, 369, 383, 386; Port Lockroy; 62° 57' S, 60° 20' 30" W; 64° 56' S, 64° 43' W; 

 WS 199, 382-5, 387, 389, 393, 395, 403, 471, 472, 474, 476, 479-83, 485-90, 493, 494A, 494B, 496, 

 497, 506, 509, 510-2, 514, 515, 555. 



Generally distributed all over the area, and at all depths down to 4773 m., but most 

 abundant in comparatively shallow water. Brady's type having only five or six chambers 

 is comparatively rare, but was common at St. 363, and records of its occurrence were 

 kept at Sts. 383, WS 471 and 482 also. No doubt it occurs at other stations, but was 

 overlooked in comparison with the local type which is longer and more tapering, the 

 septal lines being less prominent. Large specimens have up to ten or even more cham- 

 bers, the last with its produced aperture sometimes forming nearly one-half of the test. 

 Both megalospheric and microspheric forms occur, the latter being much more 

 numerous than the former. The megalospheric form is practically identical with Brady's 

 figures, and the question arises whether he was acquainted with the large and slender 

 microspheric form. 



The species is extremely common at Sts. 180, 181 and 186, all of which are in com- 

 paratively shallow water in the Palmer Archipelago; common at Sts. 196, 363, WS 395 

 and 479, and frequent at Sts. 175, 209, WS 383, 385, 482, 483, 485, 487, 496 and 514. 

 At the remaining stations it is more or less rare, and in deep water often very small. 



141. Reophax spiculifer, Brady (SG 100). 



Ten stations: WS 377, 496, 497, 506, 507 A, 507 b, 510, 511, 514, 515. 



Frequent at Sts. WS 497 and 506, rare or very rare elsewhere. With one exception, 

 St. WS 377 (2352 m.), the records are from the Bellingshausen Sea in depths between 



