4 BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



dredgings, are almost certainly of pre-Recent age. This phenomenon 

 (fossil Foraminifera found in Recent ocean sediments) is encountered 

 often, particularly in areas where manganese nodules or other evi- 

 dences of nondeposition are found. These fossil species are Hofkerina 

 semiornata (Howchin), Ehrenbergina bicornis Brady, and Globigeri- 

 noides sacculijer (Brady) fistuiosa (Schubert). In addition, several 

 other species, such as Bueningia creeki Finlay and Cassidulina moluc- 

 censis Germeraad, although undoubtedly of Recent origin in the 

 present collections, were described first from Tertiary rocks. 



Altogether, 139 species (3 indeterminate) and 6 subspecies are in- 

 cluded in the present study. They are grouped in 70 genera and 14 

 families. 



BENTHONIC FAMILIES 

 Family SPIRILLINIDAE 



Genus SPIRILLINA Ehrenberg, 1843 



SPIRILLINA DENTICULOGRANULATA Chapman 



Spirillina denticulo-granulata Chapman, 1907, Journ. Quekett Micr. Club, ser. 

 2, vol. 10, p. 133, pi. 10, fig. 6; 1909, Subantarctic Islands of New Zealand, 

 p. 354, pi. 17, fig. 3. — Graham and Militante, 1959, Stanford Univ. Publ., 

 Geol. Sci., vol. 6, no. 2, p. 102, pi. 16, fig. 3.— Todd, 1961 (1962), U.S. Geol. 

 Surv. Prof. Paper 354-H, p. 179 (table 1), pi. 23, fig. 5. 



A single specimen from 40-50 fathoms, off Fiji, appears to belong 

 in this rather distinctive species in which the edges of the coils are 

 marked by high, sharp, limbate, outward-flaring ridges with the 

 intervening channels ornamented by transverse grooves. The op- 

 posite face of the test is slightly concave and filled with papillae and 

 is indistinguishable from that of Spirillina inaequalis. 



SPIRILLINA INAEQUALIS Brady 



Spirillina inaequalis Brady, 1884, Rep. Voy. Challenger, Zoology, vol. 9, p. 631, 

 pi. 85, figs. 8-11.— Rhumbler, 1906, Zool. Jahrb., Abt. Syst., vol. 24, p. 34, 

 pi. 2, fig. 12. — Cushman, 1933, Cushman Lab. Foram. Res. Spec. Publ. 5, 

 pi. 29, fig. 4 [view c is reversed with respect to views a and b]. 



Spirillina limbata H. B. Brady var. denticulata H. B. Brady. — Cushman, 1915, 

 U.S. Nat. Mus. Bull. 71, pt. 5, p. 5, pi. 3, figs. 1, 2; 1931, U.S. Nat. Mus. 

 Bull. 104, pt. 8, p. 8, pi. 2, figs. 4, 5. 



Spirillina tuberculato-limbata Chapman, 1899, Journ. Linnean Soc. London, 

 Zoology, vol. 28, p. 11, pi. 1, fig. 8. 



This is the best represented species of Spirillina and the only one 

 found to any extent in deep as well as shallow water. The species 

 appears to have a worldwide distribution. 



Its specific name is singularly appropriate, being applicable to its 

 unequal faces. On its flat face, by which presumably it is attached 



