332 FORAMINIFERA OF THE CRAG. 



Gyboidina oebiculaeis, d'Orbigny, 1826. Ann. Sci. Nat., vol. vii, p. 278, No. 1 ; 



Modele, No. 13. 

 — ljevigata, d'Orb., 1826. Ibid., p. 278, No. 2. 



Rotalia oebiculaeis, Jones and Parker, 1860. Quart. Journ. Geol. Soc, vol. 



xvi, p. 302, No. 123, Tables. 



— — Reuss, 1861. Sitzungsb. Akad. Wiss. Wien, vol. xlii, 



p. 359. 



— — — 1863. Bullet. Acad. Roy. Belg., ser. 2, vol. xv, 



p. 155, No. 54. 



— — Brady, 1864. Trans. Linn. Soc, vol. xxiv, p. 470, pi. xlviii, 



fig. 16. 



— — J. and P., 1864. Geologist, vol. vii, p. 86. 



— Beccaeii, var. orbiculaeis, P. and J., 1865. Phil. Trans., vol. civ, 



p. 389, pi. xvi, fig. 34. 



— oebiculaeis, P., J., and B., 1865. Ann. Mag. Nat. Hist., ser. 3, vol. 



xvi, p. 20, pi. iii, fig. 85. 



— — J., P., and B., 1866. Mon. Crag Foram., Append., 



No. 89. 



— — Brady, 1868. Proc. Phil. Soc. Glasgow, vol. vi, p. 358; 



Trans. Geol. Soc. Glasgow, vol. iii, p. 125. 



— — P., J., and B., 1871. Ann. Mag. Nat. Hist., ser. 4, 



vol. viii, p. 175, pi. xii, fig. 150. 



— — Terguem, 1882. Meui. Soc. Geol. Prance, ser. 3, vol. ii, 



Mem. Ill, p. 60, pi. xii, figs. 1 — 3. 



— — Brady, 1884. Eeport ' Challenger,' pp. 627, 706, pi. cvii, 



fig. 5 ? ; pi. cxv, fig. 6. 



— — Fornasini, 1886. Boll. Soc. Geol. Ital., vol. v, p. 153. 



— — Brady, 1S87. Journ. R. Micr. Soc, p. 923. 



— — Terrigi, 1891. Mem. Descriz. Cart. Geol. (E. Com. 



Geol. Ital.), vol. iv, p. 108, pi. iv, 

 fig. 14. 

 Rotalina oebiculaeis, Egger, 1893. Abh. k. Bayer. Ak. Wiss., vol. xviii, p. 421, 



pi. xix, figs. 22—24. 

 Rotalia oebiculaeis, Fornasini, 1894. Foram. Coll. Sold., Sagg. Oritt., p. 9. 

 Rotalina obbicularis, Fgger, 1895. Jahresb. Nat. Ver. Passau, vol. xiv, p. 34, 



pi. v, figs. 11 a — c. 



Characters. — Shell composed of three or four convolutions ; spiral face flat or 

 slightly conical, inferior surface highly convex. All the segments are visible on 

 the spiral surface, those of the latest convolution only on the other face. Septal 

 lines scarcely depressed. Aperture on the inner margin of the terminal chamber, 

 close to its line of contact with the previous whorl. 



This minute compact form differs from its type Rotalia Beccarii in having its 

 spiral face nearly flat, and its inferior surface much more highly convex. It is 

 also free from granular or other exostoses indicative of free growth of shell- 

 substances. 



