POLYMORPHINA PROBLEMA. 267 



Occurrence. — Folymorphina communis (including P. prohlerna) is essentially a 

 slialloTV-water form, tlie greatest depth at which it has been observed being 155 

 fathoms (Brady). Its geographical range is almost world-wide. 



As a fossil it has been found in the Lower Lias ; the Neocomian (Bargate 

 beds of Surrey) ; the Gault of Folkestone ; the Red Chalk ; the Oligocene of 

 Elsass and Pietzpuhl, the Miocene of Vienna and Muddy Creek (Victoria) ; the 

 Pliocene of Antwerp, Garrucha (Spain), and St. Erth. In the Coralline Crag we 

 have specimens from every zone examined. 



11. PoLYMORPHiNA PROBLEMA, cVOrhi(jwj, 1826. Plate I, fig. 64 ; Plate V, fig. 23; 



Plate VI, figs. 12 a, h. 



Part I, 1866, Appendices I and II, Tables, No. 51. 



PoLYMOKPiiiNA (GtUttulina) pboblema, iV Ovh., 1S26. A-nn. Sti. Nat,, vol. vi, 



p. 266, No. 14 ; Modele No. 61. 



— CEASSATiNA, Bomer, 1S38. Neues Jahrb., &c., 1838, p. 385, pi. iii, 



fig. 30. 



— spiCEFOEMis, Romer, 1838. Ibid., p. 386, pi. iii, fig. 31. 

 GxiTTULiNA PROBLEMA, Eeuss, 1846. Ill Greiuitz's Grundriss, &c., p. 669, pi. xxiv, 



fig. 83. 



— — d'Orb., 1846. For. foss. Vien., p. 224, pi. xii, figs. 26—28. 



— AusTBiACA, d'Orb., 1846. Ibid., p. 223, pi. xii, figs. 23—25. 

 PoLTMOEpniNA PBOBLEMA, Bgcjev, 1857. Neues Jahrb., <fec., 1857, p. 287, pi. x, 



figs. 23—25. 



— UVULA, 'Egrjer, 1857. Ibid., p. 285, pi. x, figs. 26—29. 

 GUTTULINA EOTUNDATA, Reuss, 1864. Sitz. k. Ak. Wiss. Wien, vol. 1, p. 469, 



pi. iii, fig. 4. 



— iNSiGNis, Reuss, 1864. Ibid., p. 470, pi. iv, fig. 4. 



— PBOBLEMA, Reuss, 1864. Ibid., p. 470, pi. v, fig. 5. 

 PoLTMOEPHiNA 8EPTATA, Terquem, 1864. 4e Mem. Foram. Lias, p. 301, pi. xiii, 



fig. 40. 

 GuTTULiNA PusiLLA, StacJie, 1865. Novara-Reise, Geol. Th., vol. i, p. 264, pi. xxiv, 



fig. 12. 

 PoLTMOEPHiNA PBOBLEMA, P., J., and B., 1865. Ann. Mag. Nat. Hist., ser. 3, 



vol, xvi, p. 28, pi. ii, fig. 50. 



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



i and ii, pi. i, fig. 64. 



— — B., P., and J., 1870. Traus. Liuii. Soc., vol. xxvii, 



p. 225, pi. xxxix, fig. 11. 

 GUTTULINA IXTEICATA, Terquem, 1S74. Foram. Syst. Oolithique, p. 311, pi. xxxiii, 



fig. 30. 

 POLTMOEPHINA ACUTA, IlantJcen, 1875. Mitth. Jahrb. k. Ungar. geol. Anstalt, 



vol. iv, p. 60, pi. viii, fig. 4. 



35 



