FORAMINIFERA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 155 



Genus PULVINULINA, Parker and Jones. 

 Pulvinulina crassa (d'Orbigny). 



This species was obtained at Stations 342 (few), 451 (rare), and 459 (few). 

 Pulvinulina crassa has been taken as far north as lat. 54 53' N., in depths ranging 

 from 725 to 2740 fathoms ; at seven or more points in the South Atlantic, 420 to 2350 

 fathoms; and at many localities in the Pacific, from 150 to 2335 fathoms. The Scotia 

 records are the most southerly from which the species has been obtained. 



Pulvinulina canariensis (d'Orbigny). 



This common and widely distributed species was found at Stations 342, 451, 459, 

 467, and 468 in fair numbers. P. canariensis is a pelagic form in the living state. 

 Its distribution, however, is better seen from the dead tests or shells to be found in the 

 deposits of the ocean floor. 



Pulvinulina truncatulinoides (d'Orbigny). 



Obtained at Stations 342, 459, 467, and 468 (not common). P. micheliniana 

 is a pelagic species ; it attains its fullest development in the warmer waters of the 

 tropics, becoming dwarfed and stunted the farther north or south of the tropics it is 

 found. The Scotia records are the most southerly known. 



Pulvinulina exigua, H. B. Brady. 



This minute species, whose natural habitat is in the deeper waters of mid-ocean, 

 is never taken in any great numbers. It was found in the deposits from Stations 342 

 (few), 417 (common), 447 (few), 451, 459, 467, and 468 (few). The Scotia records are 

 the farthest south that P. exigua has ever been collected. 



Pulvinulina karstem (Reuss). 



Obtained (rare) at Station 447 only. The best examples of P. karsteni have 

 been collected in the Arctic Seas, in shallow water ; the Scotia station is the 

 greatest depth that this species has been recorded from, and also the most southerly 

 point. 



Pulvinulina etegans (d'Orbigny). 



Obtained (few) at Station 342. 



Pulvinulina umbonata, Reuss. 

 Taken very sparingly at Station 346, 56 fathoms. 



Pulvinulina f aims, H. B. Brady. 



This remarkable and comparatively rare species was taken at Station 459, 1998 

 fathoms, in its typical form, although somewhat dwarfed, with its test beautifully 



(KOY. soc. EDIN. TRANS., VOL. XLIX., 102i>.) 



