FOEAMINIFERA OF THE ATLANTIC OCEAN 81 



Journ. Linn. Soc. Zool., vol. 28, 1900, p. 179.— Kiaer, Rep't Norwegian 

 Fish, and Mar. Invest., vol. 1, No. 7, 1900, p. 22.— Rhumbler. Arch. 

 Prot., vol. 3, 1903, p. 285, fig. 137 in text.— Earland, Journ. Quekett Micr. 

 Club, ser. 2, vol. 9, 1905, p. 199.— Rhumbler, Zool. Jahrb., Abt. Syst., 

 vol. 24, 1906, p. 30, pi. 2, fig. 6.— Chapman, Journ. Linn. Soc. Zool., vol. 



30, 1907, p. 22, pi. 2, fig. 46.— Millett, Rec. Forani. Galway, 1908, p. 5, 

 pi. 1, fig. 1.— Bagg, Proc. U. S. Nat. Mus., vol. 34, 1908, p. 123.— Heron- 

 Allen and Earland, Journ. Roy. Micr. Soc, 1909, p. 318; 1910, p. 

 405. — Chapman, Subantarctic Islands of New Zealand, 1909, p. 325. — 

 J. Wright, Proc. Belfast Nat. Field Club, Appendix, 1910-11, p. 7.— 

 SiDEBOTTOM, Mem. Proc. Manchester Lit. Philos. Soc, vol. 54, No. 16, 

 1910, p. 7. — Heron-Allen and Earland, Proc. Roy. Irish Acad., vol. 



31, pt. 64, 1913, p. 36.— Pearcey, Trans. Roy. Soc. Edinburgh, vol. 49, 

 1914, p. 996. — Chapman, Biol. Res. Endeavour, vol. 3, pt. 1, 1915, p. 12. — 

 Heron-Allen and Earland, Trans. Zool. Soc. London, vol. 20, 1915, 

 p. 593; Trans. Linn. Soc. London, ser. 2, vol. 11, 1916, p. 217. — Chapman, 

 British Antarctic Exped., GeoL, vol. 2, 1916 (1917), pp. 29, 43, 60, pi. 2, 

 fig. 8. — Cushman, Bull. 71, U. S. Nat. Mus., pt. 6, 1917, pp. 5, 25, pi. 1, 

 fig. 2; pi. 2, fig. 2, figs. 2, 3 in text. — Sidebottom, Journ. Roy. Micr. Soc, 



1918, p. 11. — Halkyard, Mem. Proc. Manchester Lit. Philos. Soc, vol- 

 62, pt. 2, 1918 (1919), p. 18.— Cushman, Proc. U. S. Nat. Mus., vol. 56, 



1919, p. 634.— Klahn, Mitth. Nat. Ges., vol. 14, 1916-17 (1920), p. 41, 

 pi. 10, figs. 3-5.— Cushman, Bull. 100, U. S. Nat. Mus., vol. 4, 1921, 

 p. 389, pi. 77, figs. 3, 4. — Heron-Allen and Earland, Bull. Soc. Sci. 

 Hist. Nat. Corse, 1922, p. 124; British Antarctic Exped., Zool., vol. 6, 

 1922, p. 74. — HoFKER, Flora en Fauna der Zuiderzee, Protozoa, 1922, 

 p. 133, fig. 11 in text. — Cushman, Publ. 311, Carnegie Instit. Washington, 

 1922, p. 58; U. S. Geol. Surv. Prof. Paper 129-E, 1922, p. 101, pi. 25, 

 fig. 1; 129-F, 1922, p. 140; Prof. Paper 133, 1923, p. 50.— Heron-Allen 

 and Earland, Journ. Roy. Micr. Soc, 1924, p. 134. — Cushman, Publ. 

 342, Carnegie Instit. Washington, 1924, p. 51, pi. 18, figs. 1, 2.— Heron- 

 Allen and Earland, Journ. Linn. Soc. Zool., vol. 35, 1924, p. 610. — 

 Cushman, Contrib. Cushman Lab. Foram. Res., vol. 1, pt. 2, 1925, 

 p. 44. — Heron-Allen and Earland, Trans. Zool. Soc London, vol. 22. 

 pt. 1, 1926, p. 69 (list). — Chapman, New Zealand Geol. Surv., Pal. Bull, 

 11, 1926, p. 27, pi. 3, figs. 1, 2.— Cushman, Publ. 344, Carnegie Instit. 

 Washington, 1926, p. SO. — Hanna and Church, Journ. Pal., vol. 1, 1928, 

 p. 197. 



Test nearly circular in side view, consisting of a proloculum and a 

 long closely coiled, planispiral second chamber of nearly equal diameter 

 throughout, slightly involute; suture distinct, somewhat depressed; 

 wall smooth and polished, occasionally showing slight Unes of growth; 

 aperture nearly the size of the open end of the tube. 



Diameter usually not exceeding 1 millimeter. 



As will be seen by the above references this is apparently a very 

 common and widely distributed species. It is very simple in its 

 characters and it is quite possible that detailed study of specimens 

 from many regions will show more than one species. It occurs in 

 very shallow warm waters of tropical coral-reef conditions in the 

 West Indies but somewhat similar forms are found in deeper cooler 

 waters. The young stages of other species may easily be taken for 

 C. involvens. 



