FOKAMINIFERA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 993 



temperature be below 40° F. Such results were found over the Glacial Clay area in 

 the Weddell Sea (see Scotia Station 420, where a fair sample of the deposit was 

 obtained). This high development and abundance of individual species is probably 

 due to vegetable and other organic material deposited m these areas, where the pelagic 

 life, both animal and vegetable, accumulates in vast quantities. 



Those few samples of the deposits obtained by the Scotia Expedition which 

 I have examined for Foraminifera have enabled me to identify no less than 267 

 species ; 1 1 of these are new, and are described and figured in this report. It is 

 worthy of note that no less than 107 of them have been recorded from the warm 

 and cold areas of the Faroe Channel in the North Atlantic. 



In the systematic list I have thought it advisable, for the advantage of future workers 

 in this comparatively unknown region, to deoote briefly where each species has hitherto 

 been recorded, with its range of depth. I find as a result of my examination that the 

 Foraminiferal fauna of the Antarctic is richer south of 70° than north of it, and it 

 appears to me that a line of demarcation should be drawn at this point, although 

 the deposits are of a similar composition. This line will probably be found to apply 

 in a like manner to the higher forms of marine life. 



The classification adopted in this paper is that of Mr J. A. Cushman as far as he 

 has published a scheme, i.e. for the Astrorhizidse, Lituolidse, and Textulariidse, and 

 that of the late Dr H. B. Brady for the remaining families. 



SYSTEMATIC LIST, WITH NOTES ON DISTRIBUTION, AND 

 DESCRIPTIONS OF NEW SPECIES. 



Family MILIOLIDM. 



Sub-family NUBECUL ARIN^E. 



Genus NuBECULARiA, Defrance. 



Nubecularia hradyi, Millet. 

 Obtained in fair numbers at Station 346, 56 fathoms. This irregular, wild-growing 

 variety has its natural habitat in the shallow, warmer waters of the tropical and sub- 

 tropical seas ; it was, however, taken by the Challenger Expedition as far south as off 

 Kerguelen, in 20 to 60 fathoms. 



Sub-family MILIOLININiE. 

 Genus Biloculina, d'Orbigny. 

 Biloculina elongato, d'Orbigny. 

 This cosmopolitan species was obtained (few) at three stations, 346, 459, and 467. 



