FORAMINIFERA OF THE ATLANTIC OCEAN 15 



The subtrochoid forms belonging to this genus are close to Nonion, 

 and the microspheric form may be very close to it in many species. 

 In the megalospheric form there is a tendency to adopt the adult 

 character at an earlier stage, and it is in this form that the trochoid 

 character usually becomes most marked. The genus is known as far 

 back as the Lower Cretaceous, Some of the older fossil species are 

 as trochoid as Recent ones. The genus seems to be most at home in 

 fairly cool waters and in the temperate zones although there are a few 

 species in warmer waters. 



NONIONELLA TURGIDA (Williamson) 



Plate 6, figures 1-4 



Rolalina turgida Williamson, Rec. Foram. Gt. Britain, 1858, p. 50, pi. 4, 



figs. 95-97. 

 Nonionina asterizans, var. turgida Parker and Jones, Introd. Foram., 



Appendix, 1862, p. 311. 

 Nonionina turgida H. B. Bradt, Trans. Linn. Soc. London, vol. 24, 1864, p. 



474; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 731, pi. 109, figs. 



17-19. — Balkwill and Wright, Trans. Roy. Irish Acad., vol. 28, Sci., 



1885, p. 352. — Terquem and Terquem, Bull. Soc. Zool. France, vol. 11, 



1886, p. 331, pi. 11, figs. 7, 8.— Siddall, Proc. Lit. Phil. Soc. Liverpool, 1886, 

 p. 71 (list).— Wright, Ann. Mag. Nat. Hist., ser. 6, vol. 4, 1889, p. 449.— 

 Halkyard, Trans. Manchester Micr. Soc, 1889. p. 71. — Robertson, 

 Trans. Nat. Hist. Soc. Glasgow, vol. 3, pt. 3, 1889-92, p. 242.— 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.— (?) Egger, Abhandl. 

 kon. bay. Akad. Wiss. Munchen, CI. II, vol. 18, 1893, p. 425, pi. 19, figs. 

 45, 46.— Goi2s, Kongl. Svensk. Vet. Akad. Handl., vol. 25, No. 9, 1894, 

 p. 105, pi. 17, fig. 832.— Wright, Irish Nat., vol. 9, 1900, p. 55.— Kiaer, 

 Rep't Norwegian Fish. & Mar. Invest., vol. 1, No. 7, 1900, p. 50; in Due 

 d'Orleans, Crois. Ocean. Mer. Gronl., 1905 (1907), p. 562. — Millett, 

 Rec. Foram. Galway, 1908, p. 7. — Heron-Allen and Earland, Proc. 

 Roy. Irish Acad., vol., 31, pt. 64, 1913, p. 145; Trans. Linn. Soc. London, 

 ser. 2, vol. 11, 1916, p. 281. 



This is a common species especially in muddy dredgings about the 

 British Isles. Whether the species identified with this from other 

 regions are the same remains to be seen. The following records 

 seem definitely to belong here: Skye, Arran, Shetland, abundant; 

 Whitehaven, rare (Williamson) ; off the Dublin coast (Balkwill and 

 Wright) ; south of Norway (Terquem and Terquem) ; Liverpool Bay, 

 rare (Siddall); southwest of Ireland, 1,000 fathoms, frequent 

 (Wright); Isle of Jersey (Halkyard); Portree Bay, Scotland, frequent 

 (Robertson); off Southport, England, rather rare (Chaster); West 

 Africa (Egger); Scandinavian coast (Goes); Dogs Bay, very rare 

 (Wright); south coast of Norway from Brevik Fiord to the Bukn 

 Fiord, 90 to 350 meters, and is found at Svolvaer, Lofoten, 200 

 meters; Vesteraalseggen, 1,187 meters (Kiaer); off Galway (Millett); 

 Clare Island region of Ireland at 16 stations; 20 stations west of 

 Scotland (Heron-Allen and Earland). There are records for it in the 

 Pleistocene beds of Norway, Scotland, and Ireland. 



