86 DISCOVERY REPORTS 



but there must be some zoological difference as H. ovicula was not found at all in South 

 Georgia. In the Antarctic they frequently, but not always, occur at the same station, 

 but even when they are found together there are no specimens intermediate in size 

 between the two. 



H. ovicula var. gracilis is common at St. WS 515, and frequent at Sts. 177 and 360, 

 rare or very rare elsewhere. As in South Georgia, fragments of more than a single 

 chamber are of rare occurrence, but two chambered specimens were found at Sts. 177, 

 360, 362, WS 199, 385 and 507 b, and a single specimen with three chambers at St. WS 

 515. This last specimen is about 0-90 mm. long, and the chambers are less elongate 

 than usual. 



157. Hormosina lapidigera, Rhumbler (Plate IX, fig. 20). 



Hormosina lapidigera, Rhumbler nov. spec, in Wiesner, 1931, FDSE, p. 92, pi. x, figs. 122-4. 



One station: WS 502. 



A single specimen about 4-0 mm. in length from 4224 m. in the Bellingshausen Sea 

 appears to be referable to Rhumbler 's species. It has a large Cyclammina cancellata 

 built into the test in addition to the usual mineral fragments. The type was recorded 

 from the Indo-Antarctic basin (65° 15' S, 80° 19' E) in 3400 m. 



Genus Haplophragmoides, Cushman, 1910 



158. Haplophragmoides canariensis (d'Orbigny) (F 90) (SG 109) (Plate III, fig. 10). 

 Seventy-two stations: 162-4, 167, 170, 175, 177, 180-2, 186, 187, 190, 194-6, 200, 202-4, 206, 209, 



360, 363, 366, 369, 377; 62° 57' S, 62° 20' 30" W; 64° 56' S, 64° 43' W; Port Lockroy; WS 201, 

 203, 204, 382-7, 3S9, 391-4, 400, 468, 469, 474-6, 480-8, 490, 493, 494A, 494B, 496-8, 507 B, 509, 

 512, 514, 515, 517. 



Almost universally distributed, occurring in each of the areas, and at all depths down 

 to 4517 m. at St. WS 400 in the Drake Strait. As usual, it reaches its maximum de- 

 velopment both in size and numbers at moderate depths, the specimens from stations 

 below 1000 m. being small and sometimes pauperate. It is common and often very 

 large at Sts. 363 and 366 in the South Sandwich Islands, also at Sts. 170, 177, 181, 190, 

 195 and WS 482 which are in the South Orkneys, South Shetlands and Palmer Archi- 

 pelago. All these stations, except St. 177 (1080 m.), are in shallow water under 350 m. 

 At most of the deep-water stations the species is represented by few and small indi- 

 viduals, and the same comment applies particularly to the stations in the Bellingshausen 

 Sea, irrespective of their depth. Both involute and evolute specimens occur, the former 

 condition being normal. Sometimes the two forms occur together as at Sts. 195 and 

 WS 482, but at Sts. 163 and 164 the evolute form predominates. Abnormal individuals 

 are not infrequent. 



At St. 181 in the Palmer Archipelago, depth 160-335 m., where the species is common, 

 a very remarkable object was found. It consists of a fragment of apparently chitinous 

 tissue, of unknown origin, in the folds of which, more or less imbedded in mud, are 

 numerous young and immature specimens of H. canariensis (PI. Ill, fig. 10). No less 

 than fifteen can be counted. It is evidently not a case of encystment, for the individuals 



