208 FORAMINIFERA OF THE CRAG. 



PoLTJioRPHiNA PEOBLEMA, Blalce, 1876. Yorkshire Lias, p. 470, pi. xvii, fig. 33. 



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

 GiTTULiNA AtJSTEiACA, Terquem, 1876. Dunkerque, p. 78, pi. x, figs. 13 — 17. 



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



— EACEMOSA, Terquem, 1878. Mem. Soe. Geo!. Fr., ser. 3, vol. i, No. 3, 



p. 46, pi. iv (ix), figs. 20—23. 



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



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



pi. xvii, fig. 5. 



— — — OTALis, Terquem, 1881, Ibid., p. 131, pi. xvii, fig. 6. 



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



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



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



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

 PoLYMOEPHiNA PEOBLEMA, Brady, 1884. 'Challenger' Eept., p. 568, pi. Ixxii, 



fig. 20; pl.lxxiii, fig. 1. 



— (Guttulina) PEOBLEMA, Basset, 1885. Ann. Soe. Sci. N. Char,- 



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

 BuLiMiNA PTEULA (part), A. Silvestri, 1893. Atti Eeud. Ace. Acireale, vol. v, 



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

 PoLTMOEPHiNA PEOBLEMA, Goes, 1894. K. Sveusk. Vet.-Akad. HandL, vol. xxv, 



No. 9, p. 56. 



Characters. — Shell oblong-ovate, iiTegulai\ Chambers numerous, much 

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

 more frequently crowded together irregulai'ly. 



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

 group of Poh/morjyhinx, 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. p-ohlema to be a 

 wild-growing modification. 



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

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



12. PoLYMORPHiNA TUEGiDA, Reuss, 1855. Plate V, fig. 25. 



Guttulina turgida, Jieuss, 1855. Sitzungsb. k. Akad. Wiss. AVien, vol. xviii, 



p. 246, pi. vi, fig. 66. 

 Poi.YMOEPHiNA (Guttulina) tuegida, Eeiiss, 1866. Denksch. k. Akad. Wiss. 



Wien, vol. xxv, p. 153, 

 No. 11. 

 Guttulina, No. 438 and No. 441, ScJilichf, 1870. Pietzpuhl.p. 77, pi. xxviii, figs. 6 



— 10 ; and pi. xxix, figs. 1 — 5. 



