20 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 7r 



vol. 15, 1897, p. 46, pi. 2, fig. 17.— Weller, Geol. Surv. New Jersey,, 

 Paleontology, vol. 4, 1907, p. 253, pi. 3, figs. 27, 28.— Cushman, Bull.. 

 100, U. S. Nat. Mus., vol. 4, 1921, p. 264, pi. 54, figs. 3, 4; U. S. Geol. 

 Survey Prof. Paper 133, 1923, p. 33, pi. 5, fig. 6.— Chapman, New Zea- 

 land Geol. Survey, Pal. Bull. No. 11, 1926, p. 68, pi. 5, figs. 10-12. 



Polymorphina (Guttulina) problema Andreae, Abhandl. Geol. Special-Karte 

 Elsass-Lothringen, vol. 2, pt. 3, 1884, p. 118, pi. 9, fig. 21 a-c. 



Polymorphina problema var. Hosius, Ver. Nat. Hist. Vereins Pr. Rheinlande^ 

 vol. 50, 1893, p. 103, pi. 2, figs. 2 a-c (not figs. 3-5). 



Guttulina communis d'ORBiGNY, Ann. Sci. Nat., vol. 7, 1826, p. 266, No. 15,. 

 pi. 12, figs. 1-4, Modeles No. 62. — Reuss in Geinitz, Grundr. Verstein.,, 

 1845-46, p. 669, pi. 24, fig. 82. 



Polymorphina communis Roemer, Neues Jahrb. f. Min., etc., 1838, p. 385^ 

 fig. 29. — H. B. Brady, Parker, and Jones, Trans. Linn. Soc, vol. 27, 

 1869, p. 224, pi. 39, figs. 10 a, &.— H. B. Brady, Rep. Voy. Challenger,. 

 Zoology, vol. 9, 1884, p. 568, pi. 72, fig. 19.— Flint, U. S. Nat. Mus. 

 Rept., 1897, p. 319, pi. 67, fig. 6 (part).— Bagg, Bull. 88, U. S. GeoL 

 Survey, 1898, p. 60, pi. 6, fig. 2. — Fornasini, Mem. Accad. Sci. Istit.,, 

 Bologna, ser. 5, vol. 8, 1900, p. 33, fig. 37.— Weller, Geol. Survey New 

 Jersey, Paleontology, vol. 4, 1907, p. 248, pi. 3, fig. 18.— Bagg, U. S> 

 Geol. Survey, Bull. 513, 1912, p. 68, pi. 21, figs. 7 a, b, 13-15.— Cushman, 

 Bull. 71, U. S. Nat. Mus., pt. 3, 1913, p. 87, pi. 37, fig. 7. 



Polymorphina lactea Walker and Jacob var. communis WiLLiAMsoN,,Recent 

 Foram. Great Britain, 1858, p. 72, pi. 6, figs. 153-155. 



Polymorphina (Guttulina) lata Egger, Neues Jahrb. fiir Min., Jahrg. 1857^ 

 p. 288, pi. 13, figs. 22-24. 



Guttulina cretacea Alth, Haidinger's Nat. Abhandl., vol. 3, 1850, p. 262^ 

 pi. 13, fig. 14. — Reuss, Haidinger's Nat. Abhandl., vol. 4, 1851, p. 28, 

 pi. 4, fig. 10. 



Polymorphina cretacea Egger, Abhandl. Kon. bay. Akad. Wiss. Mtinchen,. 

 CI. II, vol. 21, pt. 1, 1899, p. 127, pi. 17, figs. 12, 13. 



Globidina irregularis Terquem, M6m. Soc. Geol. France, ser. 3, vol. 1, 1878, 

 p. 44, pi. 4 (9), figs. 13, 14. 



Polymorphina lactea Sidebottom, Mem. Proc. Manchester Lit. Philos. Soc, 

 vol. 5, No. 9, 1907, p. 9, pi. 2, fig. 11.— Franke, Abhandl, geol. pal. 

 Instit. Univ. Greifswald, vol. 6, 1925, p. 77, pi. 6, fig. 18; Danmarks 

 Geol. Unders. 2, Raekke, No. 46, 1927, p. 34, pi. 3, fig. 13. 



Globulina gibba var. glomula Fornasini, Mem. Accad. Istit. Bologna Sci., 

 ser. 5, vol. 9, 1900-1902 (1902), p. 68, fig. 20 in text. 



Test broadly fusiform, acute at the apertural end, more or less 

 rounded at the initial end in the megalospheric form, rather rounded 

 at the base in the microspheric form; chambers elongated, more or 

 less inflated, arranged in a clockwise, quinqueloculine series, each suc- 

 ceeding chamber slightly removed from the base; sutures depressed, 

 very distinct; wall rather thick, smooth; aperture radiate. 



Length, 0.50-1.25 mm.; breadth, 0.40-1.25 mm.; thickness, 0.28- 

 0.70 mm. 



Most authors describe Guttulina problema as a species having 

 chambers arranged triserially or crowded together irregularly, but 

 we have seen no specimens having triserial or irregularly arranged 

 chambers, and all the specimens are characterized by a quinquelocu- 



