34 BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



Genus SPIROLOCULINA d'Orbigny, 1826 



Spiroloculina d'Orbigny, Ann. Sci. Nat., vol. 7, p. 298, 1826. — H. B. Bbady, 

 Rep. Voy. Challenger, Zoology, vol. 9, p. 147, 1884. — Chapman, The Foram- 

 inifera, p. 89, 1902. — Cushman, Cushman Lab. Foram. Res. Spec. Publ. 

 No. 1, p. 149, 1928 ; U. S. Nat. Mus. Bull. 104, pt. 6, p. 40, 1929. 



Miliola (part) Lamarck, Ann. Mus. d'Hist. Nat, vol. 5, p. 352, 1804 (and later 

 authors). 



Genotype. — By designation, Spiroloculina depressa d'Orbigny. 



Test with the early chambers in the microspheric form quinquelo- 

 culine, the later ones in a single plane; chambers a half coil in 

 length, in the megalospheric form all the chambers usually in one 

 plane; apertural end usually with a neck and lip, simple, with a 

 simple or bifid tooth. 



Permian (?) Cretaceous to Recent. 



This is a more specialized genus than Massilina, and the character 

 of having chambers in a single plane is taken on very early even 

 in the microspheric form. In the shallow-water material of the 

 Pacific islands, specimens of this genus are often very abundant but 

 belong to but few species. 



SPIROLOCULINA GRATELOUPI d'Orbigny 



Plate 8, Figures 9-11 



Spiroloculina grateloupi d'Orbigny, Ann. Sci. Nat., vol. 7, p. 298, 1826. — Terquem, 

 Mem. Soc. Geol. France, ser. 3, vol. 1, p. 52, pi. 5, figs. 5, 6, 1878. — Wiesner, 

 Arch. Prot., vol. 25, p. 208, 1912.— Cushman, U. S. Nat. Mus. Bull. 71, pt. 6, 

 p. 31, pi. 4, figs. 4, 5, 1917 ; Proc. U. S. Nat. Mus., vol. 56, p. 634, 1919 ; U. S. 

 Nat. Mus. Bull. 100, vol. 4, p. 396, pi. 78, figs. 4 a, o ; pi. 100, fig. 3 ; figs. 17, 18 

 (in text), 1921; Carnegie Inst. Washington Publ. 311, p. 59, 1922; Publ. 342, 

 p. 56, pi. 20, figs. 3, 4, 1924 ; Publ. 344, p. 80, 1926 ; U. S. Nat. Mus. BuU. 104, 

 pt. 6, p. 40, pi. 8, figs. 1 a, o, 1929. 



Spiroloculina ewcavata H. B. Brady (not d'Orbigny), Rep. Voy. CJiallenger, 

 Zoology, vol. 9, p. 151, pi. 9, figs. 5, 6, 1884. 



Spiroloculina impressa H. B. Brady (not Terquem), Rep. Voy. Challenger, Zool- 

 ogy, vol. 9, p. 151, pi. 10, figs. 3, 4, 1884. 



Spiroloculina angulosa d'Orbigny, Ann. Sci. Nat., vol. 7, p. 298, 1826. — Fornasini. 

 Mem. Accad. Sci. Istit. Bologna, ser. 6% vol. 1, p. 5, pi. 1, fig. 8, 1904. 



Test elongate, broadest in the center, tapering toward either end; 

 chambers rapidly thickening as added, in end view the periphery 

 much the broadest portion of the test, central portion deeply exca- 

 vated ; periphery of the chambers in end view much convex, especially 

 in the central portion, the edges broadly rounded; chambers evenly 

 curved, the final chamber somewhat projecting, both at the base and 

 at the apertural ends, the latter having a decided neck with a phialine 

 lip ; the aperture itself rounded and with either a single tooth with a 

 bifid end, the two projections forming a concave extremity, or in some 



