18 BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



Hanzawaia concentrica (Cushman). — Puri, 1953, Florida Geol. Surv., Geol. Bull. 



36, p. 140, pi. 12, figs. 7-9.— McLean, 1956, Bull. Amer. Pal., vol. 36, no. 160, 



p. 367, pi. 49, figs. 4-6.— Sabol, 1960, Bull. Amer. Pal., vol. 41, no. 191, 



p. 233, pi. 27, figs. 7, 8. 

 Cibicidina concentrica (Cushman). — Parker, 1954, Bull. Mus. Comp. Zool., vol. 



Ill, no. 10, p. 544, pi. 13, figs. 7, 10. 



This plano-convex species is recorded widely from Miocene to 

 Recent, mostly in shallow or only moderately deep water. Rare speci- 

 mens were found in four samples. 



Family ROTALIIDAE 



Genus GAVELINOPSIS Hofker, 1951 



GAVELINOPSIS PRAEGERI (Heron-Allen and Earland) 



Plate 8, Figure 1 

 Discorbina praegeri Heron-Allen and Earland, 1913, Proc. Roy. Irish Acad., 



vol. 31, pt. 64, p. 122, pi. 10, figs. 8-10. 

 Discorbis(?) praegeri (Heron-Allen and Earland). — Cushman, 1931, U.S. Nat. 



Mus. Bull. 104, pt. 8, p. 30, pi. 6, fig. 4. 

 Gavelinopsis praegeri (Heron-Allen and Earland). — Hofker, 1951, Siboga- 



Exped., Mon. IVa, pt. Ill, p. 486, text figs. 332-334.— Parker, 1958, Rep. 



Swedish Deep-Sea Exped., vol. 8, Sediment Cores, no. 4, p. 264, pi. 3, figs. 



24, 25. 

 Discorbina isabelleana d'Orbigny, sp. — Brady, 1884, Rep. Voy. Challenger, Zool- 

 ogy, vol. 9, p. 646, pi. 88, fig. 1. 

 Discorbis lobatulus Parr, 1950, B.A.N.Z. Antarctic Res. Exped. 1929-1931 Rep., 



ser. B, vol. 5, pt. 6, Foraminifera, p. 354, pi. 13, figs. 23-25. 



Described from around the British Isles, this species seems to have 

 a worldwide distribution. It occurs in both shallow and deep-water 

 samples of the present collection but never more than rarely. 



The umbilical plug of shell material, although variable in size, is 

 the distinguishing feature. The dorsal surface is smooth and glassy, 

 less distinctly punctate than the ventral surface, and ranges from 

 conical to nearly flat. 



Genus ROTORBINELLA Bandy, 1944 



ROTORBINELLA MIRA (Cushman) 



Plate 8, Figure 2 



Discorbis mira Cushman, 1922, Carnegie Instit. Washington, Publ. No. 311, 

 p. 39, pi. 6, figs. 10, 11; 1931, U.S. Nat. Mus. Bull. 104, pt. 8, p. 25, pi. 5, 

 figs. 5, 6. — Bermudez, 1935, Mem. Soc. Cubana Hist. Nat., vol. 9, p. 205, 

 pi. 15, figs. 1-5.— Todd, 1957, U.S. Geol. Surv. Prof. Paper 280-H, p. 290 

 (tbl. 4), pi. 90, fig. 5. 



Discorbis mirus Cushman. — Graham and Militante, 1959, Stanford Univ. 

 Publ., Geol. Sci., vol. 6, no. 2, p. 93, pi. 13, fig. 23. 



Discorbina turbo d'Orbigny, sp. — Brady, 1884, Rep. Voy. Challenger, Zoology, 

 vol. 9, p. 642, pi. 87, fig. 8. 



