22 DISCOVERY REPORTS 



CIRCUMPOLAR SPECIES 



As I have already explained, there are a considerable number of species which have a 

 more or less cosmopolitan distribution. They are principally Arenacea, and are found in 

 all areas of the Antarctic as well as in cold water (which outside the Polar regions means 

 deep water) in all the oceans. Apart from these cosmopolitans, there are a few species 

 which appear to have a complete circumpolar distribution; they have been recorded 

 from widely separated areas, but nevertheless are unknown outside the Antarctic. As 

 they are all recent species, it follows that they must have acquired their universal distri- 

 bution since the disappearance of the barriers between the areas. It must be presumed 

 that they are more adaptable to changes of environment than the other purely Antarctic 

 species. Among such circumpolar forms are the following, some being quite common, 

 others rare : 



No. 



176 Ammomarginulina ensis, Wiesner 



265 Delosina sutilis, Earland 1 Recorded by Wiesner under one name D. complexa (Side- 



266 Delosina wiesneri, EarlandJ bottom) 



296 Ehrenbergina hystrix, Brady, var. glabra, Heron-Allen and Earland 



366 Lagena marginata, Walker and Boys, var. fissa, Heron- Allen and Earland 



387 Lagena scottii, Heron- Allen and Earland (?L. ornata (Seguenza) of Wiesner) 



396 Lagena squamoso-sulcata, Heron-Allen and Earland 



407 Lagena texta, Wiesner 



86 Proteonina tubulata (Rhumbler) {Saccammina tiibulata, Rhumbler of Wiesner) 



282 Pseiidobulimina chapmani (Heron-Allen and Earland) {Robertina chapmani of Wiesner) 



232 Textularia antarctica (Wiesner) {Pseiidoholivina antarctica, Wiesner) 



51 Vanhoeffenella gaiissi, Rhumbler 



240 Verneuilina minuta, Wiesner 



FOSSIL FORAMINIFERA 



At St. WS 555 in the Weddell Sea to the south-east of the South Sandwich group 

 (60° 27' S, 19° 36' W) in 3850 m. a considerable number of fossil Globigerinae were 

 found, but no other fossils. Most of the specimens appear to be solid casts without 

 remains of the original shell, but others are in a better state of preservation. To me they 

 have the appearance of being derived from two sources, a hard chalk or limestone and a 

 softer formation. Globigerina pachy derma can be identified and there are probably one 

 or two other species of Globigerina present. From the number of specimens in the small 

 sample it would seem probable that the deposit from which they were derived was not 

 distant. 



This station would appear to be on the eastern or outer edge of the Scotia arc, if its 

 line is as stated on p. 16 of Macfadyen's report on the fossils from the Burdwood Bank 

 (M. 1933, FFBB). 



Very few other fossils were seen. At St. 181 in the Palmer Archipelago, 160-335 m., 

 I found a perfect calcite cast of a Polymorphina, probably Globulina gibba var. globosa, 

 Miinster, which Macfadyen has already recorded from the Burdwood Bank (op. cit., 

 p. 4). At St. 170, off Cape Bowles, Clarence Island (61° 25' 30" S, 53° 46' W) in 342 m., 

 several specimens of Cristellaria were found. Two, in good condition though rather 



