THE ANTARCTIC FORAMINIFERAL FAUNA 7 



alveolata var. separans, L. qtiadralata, L. revertens, Miliolina insignis, Nonion sloanii, 

 Ophthahniduim margaritiferum, Rotalia beccarii and Virgulina schreibersiana var. com- 

 planata. 



VII. PALMER ARCHIPELAGO 

 Sts. 180-2, 185-7, 190-2 ; 64° 56' S., 64° 43' W. ; Port Lockroy. 



The soundings received from this land-locked area were terrigenous muds which 

 gave little promise of a rich foraminiferous fauna, the residues as a rule yielding only a 

 few common species, chiefly Arenacea. The dredgings and residues from nets revealed 

 an extremely abundant fauna, characterized by the large size attained by many species 

 on what must have been a rich feeding ground. The genus Pelosina in particular was 

 abundant to a degree I have never seen equalled, and nearly all the known species were 

 obtained, some attaining unusual dimensions. Reophax was also well represented in 

 species and attained great dimensions, R. pilulifer being unusually large and common. 

 Many interesting species were recorded. Operculina balthica (the only record) at 

 St. 180 ; Sorosphaera socialis, Bathysiphoii argillaceus, Thiirammina spumosa and Cibicides 

 grossepimctatus, which last is common in several gatherings. 



In such a land-locked area Pacific influence is not very conspicuous, but a few species 

 indicate the presence of warmer water; e.g. Globigerina bidloides is sometimes frequent, 

 and there are records of Globorotalia scitula, Bulimiiia inflata, B . patagonica, Dendronina 

 arborescens var. antarctica, Globigerina triloba, Sigmoilina sigmoidea, Rotalia beccarii and 

 a few others. 



VIII. BELLINGSHAUSEN SEA 

 Sts. WS 495-9, 502-3, 505-7 B, 509-17. 



The material consisted of soundings made on the continental shelf and slope between 

 179 and 2770 m., and two deeper soundings, Sts. WS 502, 503, on the floor of the 

 Bellingshausen Sea in over 4000 m. The inshore soundings were terrigenous grey 

 and brown muds, the deeper were red clay. Most of them yielded a characteristic 

 Antarctic fauna with a limited number of species, chiefly Arenacea, but at many of the 

 stations this fauna was more or less obscured by the abundant Globigerinae. G.pachy- 

 derma, with occasionally G. couglomerata, sometimes formed up to 80 per cent of the 

 residues, a most unusual occurrence in such high latitudes. In addition to the normal 

 Antarctic forms, a number of interesting records were made including many of the new 

 species recorded from the Scotia Sea and Drake Strait: Reophax micaceus, Cystammina 

 argentea, Spirolocammina tenuis and Placopsilinella aiirantiaca. Rupertia stabilis was 

 found at St. WS 505, more than 20'' S of its previous record to the north of the Falk- 

 lands. Hormosina lapidigera, Thuramrtdna murata and Psammophax consociata were all 

 found at a great distance from their previously known localities. 



Pacific influence appears to be even more strongly marked in this region than in the 

 others. The influx of warm water is shown by the abundant Globigerinae . Globigerina 

 pachyderma might be expected to occur, but G. congloinerata, a subtropical and sub- 

 Antarctic species, is more abundant than in the Drake Strait, and becomes dominant at 



