50 BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



Goes, Kongl. Svensk. Vet. Akad. Handl., vol. 25, No. 9, 1894, p. 95, 

 pi. 16, fig. 801. — Amicis, Nat. Sicil., Ann. 14, 1895, p. 119. — Silvestri, 

 Atti Accad. Sci. Acireale, vol. 7, 1895-96 (1896), p. 53.— Goes, Bull. 

 Mus. Comp. Zool., vol. 29, 1896, p. 75. — Jones, Foram. Crag, pt. 4, 1897, 

 p. 317, pi. 2, figs. 25-27.— Flint, Ann. Rep't. U. S. Nat. Mus., 1897 (1899), 

 p. 328, pi. 72, fig. 8. — Wright, Irish Nat., vol. 9, 1900, p. 55. — Chapman, 

 Journ. Linn. Soc. Zool., vol. 28, 1902, pp. 196, 209, 407.— Millett, Journ. 

 Roy. Micr. Soc, 1904, p. 496. — Chapman, Journ. Quekett Micr. Club, 

 ser. 2, vol. 10, 1907, p. 138. — Millett, Rec. Foram. Galway, 1908, p. 6. — 

 Bagg, Proc. U. S. Nat. Mus., vol. 34, 1908, p. 163.— Chapman, Subant- 

 arctic Islands of New Zealand, 1909, p. 360. — Sidebottom, Mem. Proc. 

 Manchester Lit. Philos. Soc, vol. 53, No. 21, 1909, p. 5. — Chapman, 

 Journ. Linn. Soc. Zool., vol. 30, 1910, p. 422. — Schubert, Abhandl. k. k. 

 Reichs., vol. 20, pt. 4, 1911, p. 110. — Heron-Allen and Earland, 

 Journ. Roy. Micr. Soc, 1911, p. 340.— Bagg, Bull. 513, U. S. Geol. Survey, 

 1912, p. 87, pi. 24, figs. 5-8. — Heron-Allen and Earland, Proc. Roy. 

 Irish Acad., vol. 31, pt. 64, 1913, p. 134. — Pearcey, Trans. Roy. Soc. 

 Edinburgh, vol. 49, 1914, p. 1041.— Cushman, Bull. 71, U. S. Nat. Mus., 

 pt. 5, 1915, p. 50, pi. 24, fig. 3. — Heron-Allen and Earland, Trans. 

 Zool. Soc. London, vol. 20, 1915, p. 713. — Chapman, Biol. Res. Endeavour, 

 vol. 3, 1915, p. 32. — Heron-Allen and Earland, Trans. Linn. Soc. 

 London, ser. 2, vol. 11, 1916, p. 275; Journ. Roy. Micr. Soc, 1916, p. 51. — 

 Cushman, Bull. 676, U. S. Geol. Survey, 1918, p. 66. — Martinotti, 

 Atti Soc. Ital. Sci. Nat., vol. 59, 1920, p. 333.— Cushman, Bull. 100, U. S. 

 Nat. Mus., vol. 4, 1921, p. 326. — Heron-Allen and Earland, Bull. Soc. 

 Sci. Hist. Nat. Corse, 1922, p. 138; British Antarctic Exped., Zoology, 

 vol. 6, 1922, p. 213. — Cushman, Publ. 311, Carnegie Instit. Washington, 

 1922, p. 51, pi. 8, figs. 10-12. — Hofker, Flora en Fauna der Zuiderzee, 

 Protozoa, 1922, p. 148, fig. 44 (in text).— Cushman, Publ. 342, Carnegie 

 Instit. Washington, 1924, p. 42, pi. 13, figs. 9, 10. — Heron-Allen and 

 Earland, Journ. Linn. Soc. Zool., vol. 35, 1924, p. 636; Journ. Roy. 

 Micr. Soc, 1924, p. 178. — Cushman, Contr. Cushman Lab. Foram. Res., 

 vol. 1, pt. 2, 1925, p. 43. — Hanzawa, Jap. Journ. Geol. Pal., vol. 4,, 1925 

 (1926), p. 44.— Chapman, New Zealand Geol. Surv., Pal. Bull., No. 11, 

 1926, p. 84, pi. 17, fig. 1. — Casasnovas, Not. Y Res. Instit. Ocean, ser. 2, 

 No. 29, 1928, p. 8.— Martinotti, Atti Soc. Ital. Sci. Nat., vol. 68, 1929, 

 p. 4. 

 Test almost equally biconvex, peripheral margin acute, often 

 slightly lobulated, carinate; chambers usually 7 or 8 in the last- 

 formed whorl, distinct, not inflated, increasing rather evenly in size 

 as added, the ventral side somewhat truncated; sutures distinct, 

 limbate on both surfaces, the dorsal ones gently curved, ventral ones 

 nearly radial; wall smooth except for the slightly raised sutures on 

 the dorsal side, finely perforate, the final chamber often with large 

 pores; aperture about midway between the umbilicus and peripheral 

 margin on the ventral side. 

 Diameter up to 2 mm. 



This species has been very widely recorded especially in warm 

 waters but there are records for it in cooler waters although there are 



