162 



rORA.MINIFERA OF THE CRAG. 



General Characters. — Typically spiral, short or elongate; trochoid or sub- 

 cylindrical ; last convolution proportionally large ; segments numerous, small at 

 first, septal plane of each segment generally directed inwards towards the central 

 umbilical axis, and rapidly increasing in size ; aperture a simple loop-like slit, 

 oblong; or arcuate in the septal face, and directed obliquely or vertically down- 

 wards, but sometimes nearly round ; one of its lips passing behind the other at 

 its umbilical margin. The chambers in the whorls may be many or few, inflated 

 or compact ; the convolution may be either produced or depressed, thus forming 

 either a long or a short shell. The Buliminae with arenaceous tests have been 

 grouped under the name Ataxophragmium by von Reuss, ' Sitzungsb. Akad. Wiss. 

 Wien,' vol. xliv, 1861, p. 383. See also Carpenter's ' Introd. Study Foram.,' Ray 

 Soc, 1862, pp. 194—197. 



1. BuLiMiNA ELEGANS, d'Ovbignij, 1826. Woodcut, fig. 17. 

 Part I, 1866, Appendix II, Table, No. 66. 



[ - 



BuLiMiNA ELEGANS, d'Orb., 1826. Ann. Sci. Nat., vol. vii, p. 270, No. 10, 



Modele No. 9. 



— ] Costa, 1838 (?). Fauna R. Nap., Foram., pi. iii, fig. 6 a, 

 A, B, c (not described). 



— J. and P., 1860. Quart. Journ. Geol. Soc, vol. xvi, p. 302, 

 Table, No. 55. 



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

 p. 20, pi. ii, fig. 64. 



— J., P., and B., 1866. Monogr. Foram. Crag, Appendix II, 

 Table, No. 66. (The specimen from 

 Chillesford here alluded to has been 

 lost sight of.) 



— Brady, 1884. Eeport ' Challenger,' p. 398, pi. 1, figs. 1—4. 



— Qumbel, 1885. Geol. Bayern., vol. i, pt. 2, pp. 421, 422, 

 fig. 266, 19. 



— Chapman, 1892. Quart. Journ. G-eol. Soc, vol. xlviii, pp. 514, 

 516, 518, pi. XV, fig. 9. 



— Hffffer, 1893. Abhandl. Bayer. Akad. Wiss., vol. xviii, part 2, 

 pp. 284 and 446, pi. viii, figs. 66 and 67. 



Fig. 17. — BuUmina elegans, d'Orb. x 60. Specimen from 

 the Coralline Crag at Broom Hill, zone d. 



