268 FORAMINIFERA OF THE CRAG. 



PoLTMOEPHiNA PBOBLEMA, Blake, 1876. Yorkshire Lias, p. 470, pi. xvii, fig. 33. 



— DiSTiNCTA, Blake, 1876. Tbid., p. 471, pi. xvii, fig. 35. 

 GcTTULiNA AusTRiACA, Terquem, 1876. Dunkerque, p. 78, pi. x, figs. 13 — 17. 



— PBOBLEMA, Terquem, 1876. Ibid., p. 79, pi. x, fig. 18. 



— BACEMOSA, Terquem, 1878. Mem. Soc. Geol. Fr., ser. 3, vol. i, No. 3, 



p. 46, pi. iv (ix), figs. 20—23. 



— EULLOiDES, Terquem, 1878. Ibid., p. 47, pi. iv (ix), fig. 27. 



— AusTBiACA, var. angusta, Terquem, 1881. Plage Dunkerque, p. 130, 



pi. xvii, fig. 5. 



— — — OTALis, Terquem, ISSl. Ibid., p. 131, pi. xvii, fig. 6. 



— — Terquem, 1882. Mem. Soc. Geol. Fr., ser. 3, vol. ii, 



p. 133, pi. xxi, fig. 36. 



— MUCRONATA, Terquem, 1882. Ibid., figs. 38, 39. 



— PBOBLEMA, Terquem, 1882. Ibid., p. 134, pi. xxi, figs. 43, 44. 

 POLYMOEPHINA PBOBLEMA, Brady, 1884. 'Challenger' Eept., p. 568, pi. Ixxii, 



fig. 20 ; pl. Ixxiii, fig. 1. 



— (Guttultna) PBOBLEMA, Basset, 1885. Ann. Soc. Sci. N. Char.- 



Inf., No. 21, p. 161, fig. 61. 

 BuLiMiNA PTEULA (part), A. Sihestri, 1893. Atti Eend. Ace. Acireale, vol. v, 



p. 10, pl. V, figs. 79, 80. 

 PoLYMOEPHiNA PBOBLEMA, Ooes, 1894. K. Sveusk. Yet.-Akad. Haadl., vol. xxv, 



No. 9, p. 56. 



Characters. — Shell oblong-ovate, irregular. Chambers numerous, mucli 

 inflated, and separated by deep sutures ; sometimes arranged triserially, but 

 more frequently crowded together irregularly. 



D'Orbigny's Modele No. 61 forms a convenient subtype, embracing a large 

 group of Poll/ morphine, which have in common a somewhat acervuline mode of 

 growth, and but little adhesion or overlap amongst the segments. His later 

 figures of the same species are by no means so characteristic, and are scarcely 

 separable from P. communis ; of which, indeed, we consider P. prohJema to be a 

 wild-growing modification. 



Occurrence. — For the occurrence of this Polymorphina, which is intimately 

 allied to P. communis^ see the notes on the latter at page 267. 



12. PoLYMOKPHiNA TUEGIDA, Bcicss, 1855, Plate V, fig. 25. 



GuTTULiNA TUEGIDA, Reuss, 1855. Sitzungsb. k. Akad. Wiss. "Wien, vol. xviii, 



p. 246, pl. vi, fig. 66. 

 Poi.yjiOEPiiiKA (GxTTTtTLixA) TUEGIDA, Reuss, 1866. Denksch. k. Akad. Wiss. 



"Wien, vol. xxv, p. 153, 

 No. 11. 

 GuTTULiNA, No. 438 and No. 441, Schliclif, 1870. Pietzpuhl,p. 77, pl. xxviii, figs. 6 



— 10 ; and pl. xxix, figs. 1 — 5. 



