364 EORAMINIFERA OF THE CRAG. 



Crag is concerned Operculina com/planata was found in company with the 

 Nummulites Boucheri and Amphistegina vulgaris in the Coralline Crag of 

 Sudbourne. We have reason to believe that none of the three are proper to the 

 Crag, but that all have been derived from earlier Tertiary beds ; so also probably 

 the Alveolina, Peneroplis, Dendritina, Orbitolites, and Orbiculina already described 

 in the foregoing Parts I and II, and the Orbitoides that follows. 



2. Operculina ammonoides (Grouovhis), 1781. Plate VII, figs. 34 a, b. 



Nautilus ammonoides, Gronovius, 1781. Zooph. Gron., p. 282, No. 1220, and 



p. v (expl. Tab.). 



— Balthicus, Schroeter, 1782. Naturforscher, vol. xvii, p. 120 ; and 1783, 



Binleitung, vol. i, p. 20, pi. i, fig. 2. 

 Operculina complanata, Parker and Jones, 1857. Ann. Mag. Nat. Hist., ser. 2, 



vol. xix, p. 285, pi. xi, figs. 3, 4. 

 Nonionina elegans, Williamson, 1858. Bee. For. Gt. Br., p. 35, pi. iii, figs. 



74, 75. 

 Operculina ammonoides, P. and J., 1861. Ann. Mag. Nat. Hist., ser. 3, vol. viii, 



pp. 229, 230. 

 — — Carpenter, Parker, and Jones, 1862. Introd. Foram., 



pp. 252, 310. 

 Nummulina perforata, var. (Operculina) ammonoides, Parker and Jones, 1865. 



Phil. Trans., vol. civ, p. 398 ; pi. xiv, figs. 44 a, b; 

 pi. xvii, figs. 62, 63. 

 Nonionina elegans, Fischer, 1870. Actes Soc. Linn. Bordeaux, vol. xxvii, p. 396 



No. 45. 

 Operculina ammonoides, B. and R., 1875. Brit. Assoc. Eep. for 1874, p. 19L 



— — Vine, 1878. Sci. Goss., vol. xiv, p. 52, fig. 31. 



— — Brady, 1884. ' Challenger ' Beport, p. 745, pi. cxn, 



figs. 1 and 2. 



— — — 1887. Journ. B. Micr. Soc, p. 926. 



— — Eager, 1893. Abh. k. Bayer. Ak. "Wiss., vol. xviii, 



p. 434, pi. xx, figs, 38, 39. (Approaches our 

 fig. 33, pi. v, in want of septal limbation.) 



— — A. Silvestri, 1893. Mem. Pontif. Accad. N. Lincei, 



vol. ix, p. 217, pi. vi, fig. 5. 



— Goes, 1894. K. Svensk. Vet.-Ak. Handl., vol. xxv, 



No. 9, p. 105, pi. xvii, figs. 833, 833 a, and 

 833 a — c. (In fig. 833 [bis] the septa are 

 rather more curved, and the chambers fuller 

 and thinner at edge, than in the type.) 

 Anomalina ammonoides (?), Woodward and Thomas, 1895. Final Eep. Geol. 



Survey Minnesota, pi. d, fig. 30. 



