BULIMINIDAE 137 



290. Cassidulina elegans, Sidebottom (Plate VI, figs. 15, 16). 



Cassidulina elegans, Sidebottom, 1910, TNC, p. 106, pi. iv, fig. i. 

 Cassidulina elegans, Cushman, 1910, etc., FNP, 191 1, p. 99. 



Three stations: 383, 384, 385. 



A single typical specimen was found at each of the stations 383 and 384, and two 

 weakly marked individuals at St. 385. All the stations are in the deep water of the Drake 

 Strait, 3638-3744 m., but inside the convergence. 



This is an essentially Pacific species, rare even in the few localities recorded. Side- 

 bottom's specimens were from 1050 fathoms in the south-west tropical Pacific (ig°04' S, 

 179° 43' E), and Cushman's from the north Pacific between Japan and Guam, 891- 

 1088 m. Its occurrence in such a distant area is very noteworthy. 



291. Cassidulina pacifica, Cushman (Plate VI, figs. 23-25). 



Cassidulina calabra, Brady (non Burseolina calabra, Seguenza, 1880), 1884, FC, p. 431, pi. cxiii, 



fig. 8. 



Cassidulina calabra. Chapman, BL, p. 275. 



Cassidulina calabra, Bagg, 1912, PPSC, p. 42, pi. xii, fig. i. 



Cassidulina calabra, Pearcey, 1914, SNA, p. 1016. 



Cassidulina calabra, Sidebottom, 1918, FECA, p. 128, pi. iii, fig. 22. 



Cassidulina calabra, Cushman, 1918, etc., FAO, 1922, p. 132. 



Cassidulina calabra, Cushman, 1925, etc., LFR, 1925, p. 55. 



Cassidulina pacifica, Cushman, 1925, etc., LFR, 1925, p. 53, pi. ix, figs. 14-16. 



Two stations: 383, 384. 



A few specimens only at each station. Both are in the deep water of the Drake Strait, 

 over 3700 m. but inside the Antarctic convergence. The best specimens were found at 

 St. 383. 



It is impossible to reconcile the C. calabra of Brady with the figure and description 

 oi Burseolina calabra, Seguenza, in spite of the fact that Brady states that he had received 

 from Seguenza specimens of his Miocene fossils, and that though their fossilized con- 

 dition had rendered the septation more or less obscure, he had no doubt that they were 

 identical in all important characters with the recent specimens which he figured. 



Seguenza 's specimens were apparently returned to him, as they are not to be found 

 in the Brady collections either at Cambridge or in the British Museum. In these 

 circumstances it would appear reasonable to adopt the name Cassidulina pacifica, 

 Cushman, for the Challenger specimens figured by Brady. 



All the records given for C. calabra above may be regarded as identifiable with 

 Brady's type, as the two authors (Chapman and Pearcey) who did not figure their 

 specimens would be familiar with the Challenger material. Pearcey 's record (Scotia 

 St. 346, near the Burdwood Bank, 56 fathoms, 54° 25' S, 57° 32' W) is of particular 

 interest as approaching the Discovery localities. The other recent records are all in the 

 Pacific and Indo-Pacific regions. 



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