48 BULLETIN 10 4, UNITED STATES NATIONAL MUSEUM 



This species is typically an Indo-Pacific one, but occurs in the West 

 Indian region and also apparently in the Mediterranean. 



Genus SIGMOILINA Schlumberger, 1887 



Sigmoilina ScHLTjUBERG^R (Genotype, by designation, Planispirina sigmoidea 

 H. B. Brady), Bull. Soc. Zool. France, vol. 12, 1887, p. 118. 



Spiroloculina (part) Costa (not d'Orbigny), Mem. Accad. Sci. Napoli, vol. 

 2, 1855 (1857), p. 126. 



Planispirina (part) H. B. Bkady (not Seguenza), Rep. Voy. C/ioHen^er, Zool- 

 ogy, vol. 9, 1884, p. 197. 



Test with the early chambers quinqueloculine, later ones added in 

 planes slightly more than 180° from one another making a continu- 

 ously revolving spiral and in transverse section producing a sigmoid 

 appearance ; aperture simple with a simple tooth ; exterior very often 

 with a superficial layer of arenaceous material. 



Tertiary and Recent. 



This genus very evidently developed from Quinqueloculina by the 

 addition of chambers in planes more than 180° so that the resulting 

 section is S-shaped. 



SIGMOILINA CELATA (Costa) 



Spiroloculina celata Costa, Mem. Accad. Sci. Napoli, vol. 2, 1855 (1857), p. 

 126, pi. 1, fig'. 14; Atti Accad. Pontaniana, vol. 7, fasc. 2, 1856, pi. 26, 

 fig. 5. 



Planispirina celata H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 

 1884, p. 197, pi. 8, figs. 1-4; Quart. Journ. Geol. Soc, vol. 44, 1888, p. 8 

 (table).— Terrigi, Mem. Com. Geol. Ital., vol. 4, pt. 1, 1891, p. 67, pi. 1, 

 figs. 5, 6. — Egger (?), Abhandl. kon. bay. Akad. Wiss. Miinchen, CI. II, vol. 

 18, 1893, p. 245, pi. 3, figs. 37-39.— A. Silvestri, Mem. Accad. Pont. 

 Nuovi Lincei, vol. 9, 1893, p. 190.— Woodward, The Observer, vol. 4, 1893, 

 p. 77.— DeAmicis, Boll. Soc. Geol. Ital., vol. 12, fasc. 3, 1893, p. 36; Nat. 

 Sicily, Ann. XIV, 1895, p. 55.— Flint, Ann. Rep. U. S. Nat. Mus., 1897 

 (1899), p. 303, pi. 47, fig. 5. — Heron-Allen and Earland, Proc. Roy. 

 Irish Acad., vol. 31, pt. 64, 1913, p. 35; Trans. Linn. Soc. London, ser. 2, 

 vol. 11, 1916, p. 216. — Sidebottom, Journ. Roy. Micr. Soc, 1918, p. 

 10.— Koch, Ber. Schweiz. Pal. Ges., vol. 18, 1923, p. 344. 



Sigmoilina celata J. Wright, Ann. Mag. Nat. Hist., ser. 6, vol. 4, 1899, p. 

 447.— Chaster, First Rep. Southport Soc. Nat. Sci. 1890-91 (1892), p. 

 56.— J. Wright, Proc Roy. Irish Acad., ser. 3, vol. 1, 1891, p. 464. — Chap- 

 man, Proc Zool. Soc London, 1895, p. 11. — Goios, Bull. Mus. Comp. Zool., 

 vol. 29, 1896, p. 81.— Chapman, Journ. Linn. Soc. Zool.. vol. 28, 1902, p. 

 399 (list). — A. Silvestri, Mem. Pont. Accad. Nuovi Lincei, vol. 22, 1904, 

 pp. 267, 268.— Chapman, Journ. Linn. Soc. Zool., vol. 30, 1907, p. 21, pi. 2, 

 fig. 41; Subantarctic Islands of New Zealand, 1909, p. 323. — Schubert 

 Abhandl. geol. k. k. Reichs., vol. 20, pt. 4, 1911, p. 126. — Chapman, Biol. 

 Res. Endeavour, vol. 3, pt. 1, 1915, p. 10. — Cushman, Bull. 71, U. S. Nat. 

 Mus., pt. 6, 1917, p. 61, pi. 24, fig. 1. — Heron-Allen and Earland, Bri- 

 tish Antarctic Exped., Zoology, vol. 6, 1922, p. 71; Journ. Roy. Micr. Soc, 

 1924, p. 133.— Hanzawa, Jap. Journ. Geol. Pal., vol. 4, 1925 (1926), p. 37 

 (table). — Yabe and Hanzawa, Jap. Journ. Geol. Pal., vol. 4, 1925 (1926), 

 p. 49. 



