FORAMINIFERA OF THE ATLANTIC OCEAN. 

 Valvulina conica — material examined. 



63 



VALVULINA FUSCA (Williamson). 



Rotalina fusca Williamson, Rec. Foram. Great Britain, 1858, p. 55, pi. 5, figs. 

 114, 115. — Terquem, Ess. Anim. Plage Dunkerque, 1875, p. 26, pi. 2, figs. 

 6, a, b. 



Valvulina fusca M. Sars, Vid. Selsk. Forh., 1868, p. 249.— H. B. Brady, Rep. 

 Voy. Challenger, Zoology, vol. 9, 1884, p. 392, pi. 49, figs. 13, 14; Journ. Roy. 

 Micr. Soc, 1887, p. 896.— Goes, Kongl. Svensk. Vet. Akad. Handl., vol. 25, 

 No. 9, 1894, p. 39, pi. 8, figs. 353-355.— Wright, Proc. Roy. Irish Acad., ser. 3, 

 vol. 1, 1891, p. 472. — Robertson, Trans. Nat. Hist. Soc. Glasgow, vol. 3, 

 pt. 3, 1892, p. 240.— Pearcey, Trans. Nat. Hist. Soc. Glasgow, vol. 2, 1890, 

 p. 176.— Goes, Bull. Mus. Comp. Zool., vol. 29, 1896, p. 35.— Chapman, 

 Journ. Linn. Soc. Zool., vol. 28, 1902, p. 400.— Cushman, Bull. 71, U. S. Nat. 

 Mus., pt. 2, 1911, p. 59, figs. 94-95. — Heron-Allen and Earland, Proc. Roy. 

 Irish Acad., vol. 31, pt. 64, 1913, p. 58; Journ. Roy. Micr. Soc, 1916, p. 42; 

 Trans. Linn. Soc. London, ser. 2, vol. 11, 1916, p. 232. — Mestayer, Trans. 

 New Zealand Inst., vol. 48, 1916, p. 129. — Sidebottom, Journ. Roy. Micr. 

 Poc. 1918, p. 24.— Cushman, Proc. U. S. Nat. Mus., vol. 56, 1919, p. 604; 

 Bull. 100, U. S. Nat. Mus., vol. 4, 1921, p. 143, pi. 28, figs, la, b. 



Description. — Test typically attached, low conical, depressed, 

 rounded, the affixed end concave; chambers spirally arranged, with 

 only throe chambers in each whorl; wall finely arenaceous, smooth; 

 aperture slit-like, at the inner basal margin of the chamber, protected 

 by a valvular lip; early chambers reddish-brown, the later yellowish- 

 brown; area of attachment light gray. 



Diameter 0.50-0.65 mm. 



Distribution. — About the British Isles at least this species is much 

 more common than the preceding, but in the western Atlantic the 

 reverse is true. Three are numerous records from off the shores of 

 Scandinavia, the British Isles, Belgium, and France, Canary Islands, 



