38 



BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



vol. 1, No. 7, 1900, p. 48.— Wright, Irish Nat., vol. 9, 1900, p. 55.— 

 CusHMAN, Bull. 71, U. S. Nat. Mus., pt. 5, 1915, p. 69, pi. 29, fig. 30; 

 text figs. 62a-c. — Heron-Allen and Earland, Trans. Linn. Soc. London, 

 ser. 2, vol. 11, 1916, p. 277; Journ. Roy. Micr. Soc, 1916, p. 53. 



Test unequally biconvex, dorsal side flattened or very slightly 

 convex, umbonate in the middle, somewhat depressed toward the 

 periphery, ventral side strongly convex, umbilicate, periphery sub- 

 acute or at least not broadly rounded; chambers 8 to 12 in the last- 

 formed whorl, distinct; sutures distinct, not depressed; wall smooth 

 throughout; aperture, a narrow opening on the ventral edge of the 

 chamber between the umbilicus and periphery. 



d'Orbigny's model of this species shows a form with a subacute 

 periphery and with the dorsal side slightly convex, highest in the 

 middle, the umbilicus nearly closed. Such specimens occur in the 

 Eastern Atlantic on the coast of Europe, but very few have been 

 observed in the dredgings from the western side of the Atlantic, 

 Flint's specimens recorded as this species not being the same. Authors 

 subsequent to Brady's Challenger Report may have been misled by 

 his figures, his Plate 107, fig. 5 as already noted by Heron-Allen and 

 Earland ^^ being a true Rotalia, probably the young of R. beccarii. 



Gyroidina orbicularis — Material examined 



GYROIDINA SOLDANn d'Orbigny 



Plate 8, figures 3-8 



Gyroidina soldanii d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 278, No. 6; 

 Modeles No. 36. — Cushman, Bull. Scripps Instit. Oceanography, Tech. 

 Ser., vol. 1, 1927, p. 162; Special Publ. No. 1, Cushman Lab. Forani. Res., 

 1928, pi. 39, fig. 13; pi. 41, fig. 7.— Church, Journ. Pal., vol. 1, 1928, 

 p. 267. — Galloway and Morrey, Bull. Amer. Pal., vol. 15, 1929, p. 27, 

 pi. 4, fig. 4. — Cushman, Contr. Cushman Lab. Foram. Res., vol. 5, 1929, 

 p. 98, pi. 14, figs. 6, 7. 



Rotalia soldanii Hantken, Mitth. Jahrg. ung. geol. Anstalt., 1875, p. 80, 

 pi. 9, figs. 7a-c. — H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 

 1884, p. 706, pi. 107, figs. 6, 7. — H. B. Brady, Parker, and Jones, Trans. 

 Zool. Soc, vol. 12, 1888, p. 229. — Terrigi, Mem. Com. Geol. Italia, vol. 

 4, 1891, p. 109, pi. 4, fig. 15. — Egger, Abhandl. kon. bay. Akad. Wiss. 

 Miinchen, CI. II, vol. 18, 1893, p. 420, pi. 19, figs. 16-18, 51.— Woodward, 

 The Observer, vol. 4, 1893, p. 178. — Silvestri, Mem. Accad. Pont. 

 Nuovi Lincei, vol. 9, 1893, p. 215. — Chapman, Proc. Zool. Soc. London, 



»i British Antarctic E.tped., Zoology, vol. 6, 1922, p. 219. 



