FOEAMIXIFERA OF THE ATLANTIC OCEAjST. 

 Glohigerina helicina — material examined. 



2q 



GLOBIGERINA AEQUILATERALIS H. B. Brady. 



Plate 4, figs. 7, 8. 



Cassidulina globulosa (part) Egger, Neiies, Jahr. fiir Min., 1857, p. 296, 

 pi. 11, fig. 4. 



Glohigerina aequilateralis H. B. Brady, Quart. Journ. Micr. Sci., vol. 19, 

 1879, p. 71; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 605, pi. SO, 

 figs. 18-21; Journ. Roy. Micr. Soc, 1887, p. 916.— Wright, Proc. 

 Belfast Nat. Field Club, 1884-5, App. 9, 1886, p. 332, pi. 27, fig. 9; 

 Ann. Mag. Nat. Hist., vol. 4, ser. 6, 1889, p. 449; Proc. Roy. Iri«h 

 Acad., ser. 3, vol. 1, 1891, p. 488. — Chapman, Quart. Journ. Geol. Soc, 

 vol. 48, 1892, p. 517, pi. 15, fig. 14.— Egger, Abh. kon. bay. Akad. 

 Wlss. Munchen, CI. II, vol. 18, 1893, p. 364, pi. 13, figs. 5-8.— Goes, 

 Kongl. Svensk. Vet. Akad. Handl., vol. 25, 1894, p. 86, pi. 14, fig. 

 767. — Chapman, Proc. Zool. Soc. London, pt. 1, 1895, p. 37; Journ. 

 Roy. Micr. Soc, 1896, p. 589, pi. 13, fig. 7.— Goes, Bull. Mus. Comp. 

 Zool., vol. 29, 1896, p. 66. — Silvestri, Mem. Pont. Accad. Nuovi 

 Lincei, vol. 15, 1899, p. 265, pi. 5, fig. 8. — Fornasini, Mem. Accad. 

 Sci. 1st. Bologna, ser. 5, vol. 7, 1899, p. 580, pi. 4, figs. 3, 4.— Flint, 

 Ann. Rep. U. S. Nat. Mus., 1897 (1899), p. 323, pi. 70, fig. 3.— Rhum- 

 bler, in Brandt, Nordisches Plankton, Heft 14, 1900, p. 20, figs. 21-23. — 

 Chapman, Journ. Linn. Soc Zool., vol. 28, 1901, p. 404. — Millett, 

 Journ. Roy. Micr. Soc, 1903, p. 689. — Chapman, Trans. New Zealand 

 Inst., vol. 38, 1905, p. 100.— Bagg, Proc. IT. S. Nat. Mus., vol. 34, 

 1908, p. 152. — Sidebottom, Mem. Proc. Manchester Lit. Philos. Soc, 

 vol. 52, No. 13, 1908, p. 4, pi. 1, fig. 10.— Chapman, Subantarctic Ids. 

 New Zealand, 1909, p. 351; Journ. Linn. Soc. Zool., vol. 30, 1910, 

 p. 417; Zool. Res. "Endeavour," pt. 3, 1912, p. 311. — Cushman, Bull. 

 71, U. S. Nat. Mus., pt. 4, 1914, p. 12, pi. 2, figs. 1-3; pi. 10, fig. 5.— 

 Chapman, British Antarctic Exped., Geology, vol. 2, 1916-17, p. 69, 

 pi. 5, fig. 37. — Heron-Allen and Earland, Trans. Zool. Soc. London, 

 vol. 20, 1915, p. 680. — Mestayer, Trans. New Zealand Inst., vol. 48, 

 1916, p. 129. — Sidebottom, Journ. Roy. Micr. Soc, 1918, p. 150. — 

 Cushman, Bull. 103, U. S. Nat. Mus., 1918, p. 67. 



Description . — Test composed of numerous inflated chambers ar- 

 ranged in a bilaterally symmetrical, planospiral coil of one and a 

 half to two Tolutions; chambers increasing rapidly in size as added, 

 usually five to six visible in side view; sutures much depressed, giving 

 a lobulated contour; v/all reticulate, often with broken spines; aper- 

 ture large, an arched opening at the base of the chamber. 



Diameter up to 1 mm. 



