ROTALIINAE 419 



Burdwood Bank, the Falkland Islands, and a line between the Falklands and Magellan 

 Straits. It has not, so far, been discovered outside this area, and in view of the Pacific 

 habitat of its allies, we can hardly doubt that it is a form of Pacific ancestry which has 

 succeeded in weathering the Horn and establishing itself in the Atlantic Ocean, without 

 as yet obtaining any wide distribution there. 



We have, in the Pearcey Collection (which is now incorporated with ours), typical 

 specimens of this species from the "Scotia" material, which appear to have escaped 

 Pearcey's notice. They came from the Burdwood Bank, 56 fms. (" Scotia" stn. 346). 



Since this species was described in 1929 {iit supra) Messrs Chapman and Parr have 

 created a new genus Heronallenia for certain species of Discorbis and Discorbina, which 

 they propose to separate, chiefly on account of the distinctive character of the aperture. 

 The genotype is declared to be Discorbina wilsoni, Heron-Allen and Earland (H.-A. 

 & E. 1922, TN, p. 206, pi. vii, figs. 17-19), and other species transferred to the new 

 genus are Discorbis kempii (H.-A. & E. 1929), D. pidvimdinoides (Cushman, ut supra), 

 D. liugidata (Burrows and Holland, 1895, J. P. & B. 1866, etc., MFC, 1895, pi. vii, 

 fig. 33, text, 1896, p. 297), and D. lingidata var. ungidculata (Sidebottom, 1918, FECA, 

 p. 256, pi. vi, figs. 12-14). We had no doubt as to the close relationships of D. kempii, 

 D. pidvimdinoides, and D. zvi/soni, but were not so convinced as regards D. lingidata 

 and its variety, which we suspected of possessing a more complex internal structure 

 connected with the dorsal vesicles distinctive of the species. But the authors, to whom 

 we communicated our views, inform us that they have gone into this matter, and are 

 convinced that the vesicles are really bead-like thickenings on the distal margins of the 

 chambers, and that they see no reason for altering their views. 



Genus Truncatulina, d'Orbigny, 1826 



355. Truncatulina refulgens (Montfort). 



Cibicides refidgcns, .Montfort, 1808-10, CS, I, p. 122, 3i'"<^ genre. 



Trimcatidina refulgens, d'Orbigny, 1826, TMC, p. 279, no. 5, pi. xiii, figs. 8-1 1, Modele no. 77. 



Truncatulina refulgens, Brady, 1884, FC, p. 659, pi. xcii, iigs. 7-9. 



Twenty-seven stations: 48, 51, 228, 235 ; WS 71, 72, 76, 77, 79, 83, 84, 86, 87, 89, 90, 91, 92, 95, 

 97, 109, 213, 217, 243, 246, 248, 408, 409. 



Very small specimens are quite common, but none of the very large individuals so 

 common on the North Atlantic coasts occur. The best specimens are found at WS 97 

 and 248. Sessile individuals are not uncommon on Algae. 



356. Truncatulina lobatula (Walker and Jacob) (Plate XIV, fig. 31). 



Nautilus lobatulus, Walker and Jacob, 1798, AEM, p. 642, pi. xiv, fig. 36. 



Truncatulina lobatula, Jones, Parker and Brady, 1866, etc., MFC, 1866, pi. ii, figs. 4-10, pi. iv, 



fig. 19; text and references, 1896, p. 304. 



Truncatulina lobatula, Brady, 1884, FC, p. 660, pi. xcii, fig. 10; pi. xciii, figs, i, 4, 5; pi. cxv, 



figs. 4, 5. 



All stations except 228, 230; WS 72, 73, 76, 108, 109, 219, 243, 431, 432. 



DIV 17 



