FORAMINIFERA OF THE ATLANTIC OCEAN 



Nonion orbiculare — Material examined 



13 



NONION PAUPERATUM (Balkwill and Wright) 



Plate 5, figures 4, 5, 7 



Nonionina pauperata Balkwill and Wright, Trans. Roy. Irish Acad., 

 vol. 28, Sci., 1885, p. 353, pi. 13, figs. 25, 26.— Halkyard, Trans. Man- 

 chester Micr. Soc, 1889, p. 71, pi. 2, fig. 13.— Chaster, First Rep't 

 Southport Soc. Nat. Sci., 1890-91 (1892), p. 66.— Wright, Proc. Roy. 

 Irish Acad., ser. 3, vol. 1, 1891, p. 493; Irish Nat., vol. 9, 1900, p. 55.— 

 Earland, Journ. Quekett Micr. Club, ser. 2, vol. 9, 1905, p. 230. — Mil- 

 lett, Rec. Foram. Galway, 1908, p. 7. — Wright, Proc. Belfast Nat. Field 

 Club, Appendix, 1910-11, p. 7. — Heron-Allen and Earland, Journ. 

 Roy. Micr. Soc, 1911, p. 342, pi. 11, figs. 16, 17; Proc. Roy. Irish Acad., 

 vol. 31, pt. 64, 1913, p. 144; Trans. Linn. Soc. London, ser. 2, vol. 11, 

 1916, p. 281. 



Test planispiral, bilaterally symmetrical, involute, periphery 

 angular; chambers, about nine in the last-formed coil, of uniform 

 shape and relative size, slightly inflated; sutures distinct, slightly 

 depressed, limbate toward the proximal end, the umbilicus filled 

 and confluent with the sutures; wall distinctly perforate, smooth; 

 aperture, a low opening at the base of the apertural face. 



There are numerous records for this species about the British 

 Isles, the following among them: Off Dublin coast (Balkwill and 

 Wright); off Jersey (Halkyard); off Southport, England, rare in 

 shore gatherings and shallow water (Chaster) ; southwest of Ireland, 

 53 and 345 fathoms; Dogs Bay, very rare (Wright); Bognor, Sussex, 

 rare (Earland); Galway, very rare (Millett); Selsey Bill, Sussex; 

 Clare Island region of Ireland; west of Scotland (Heron- Allen and 

 Earland). Wright also records it from the Pleistocene of the north 

 of Ireland. 



This is very much like A^ germanicum and may be only a slightly 

 broader form of the same species. 



NONION (7) EXPONENS (H. B. Brady, Parker, and Jones) 



Plate 5, figure 6 



Nonionina exponens H. B. Brady, Parker, and Jones, Trans. Zool. Soc, 

 vol. 12, 1888, p. 230, pi. 43, fig. 16. 



"Test free, equilateral, planospiral; lateral faces convex or some- 

 what flattened, peripheral edge rounded; composed of from 2 to 3 



