224 MESSRS. BRADY, PARKER, AND JONES 
POLYMORPHINA BURDIGALENSIS, D'Orbigny. (Plate XXXIX. figs. 9, a, b.) 
Polymorphina Burdigalensis, D'Orbigny, 1826, Ann. Sci. Nat. vol. vii. p. 265, no. 2; Modèle no. 29. 
Characters.—Shell oblong, unsymmetrical ; flattened, or even slightly concave on one 
side, irregularly convex on the other; anterior extremity acute, posterior rounded. 
Septal lines slightly excavated. Aperture excentric, situate near the flattened side of the 
terminal segment. Surface smooth. 
The mere name of a species in a synopsis, with reference to a plaster digne is far from 
being a satisfactory basis on which to lay down its normal peculiarities ; yet this is all we 
have as authority for Polymorphina Burdigalensis. D'Orbigny's * Modèle,” which we 
assume to be a fair representation (Ann. N. H. 1865, ser. 3, vol. xvi. p. 181, pl. 2. fig. 48), 
exhibits a compact shell, somewhat resembling P. Humboldtii in its septation, flattened 
on one side and having rounded edges. The chambers are numerous and obscurely tri- 
serial in their arrangement, and the septa are marked by lines rather than depressions. 
We may just remark that the Guttulina semiplana of Reuss (Zeitschr. deutsch. geol. 
Gesell. vol. iii. p. 82, pl. vi. figs. 48, a—c) resembles P. Burdigalensis in the contour of its 
transverse section; but as its general characters are much more those of P. communis, 
we have preferred to associate it with the latter. 
Distribution.—The only habitat appended to the species in the * Tableau Méthodique 
is, ** Fossil, near Bordeaux," from which we suppose it to be a Middle-Tertiary form. 
POLYMORPHINA COMMUNIS, D'Orbigny. (Plate XXXIX. figs. 10, a, b.) 
Polymorphina (Guttulina) communis, D'Orbigny, 1826, Ann. Sc. Nat. vol. vii. p. 226, no. 15, pl. 12. 
figs. 1-4; Modèle no. 62. 
? Guttulina vitrea, D’Orbigny, 1836, Foram. Cuba, p. 128, pl. 2. figs. 1-3. 
Polymorphina (Guttulina) communis, Roemer, 1838, Neues Jahrb. für Min., J ahrg. 1838, p. 385, pl. 3. 
fig. 29. 
P. (Globulina) oblonga, id. ibid. p. 386, pl. 3. fig. 84. 
? P. glomerata, Roemer, 1841, Verstein. nordeutsch. Kreid. pt. 2, p. 19, pl. 15. fig. 19. 
P. communis, Morris, 1843, Cat. Br. Foss. 1st ed. p. 62. 
? P. glomerata, Reuss, 1845, Verstein. bóhm. Kreid. pt. 1, p. 40, pl. 12. fig. 32; Reuss, 1845, im 
Geinitz's Grundriss der Verstein. p. 668, pl. 25. fig. 19. 
Guttulina communis, Reuss, ibid. p. 669, pl. 24. fig. 82; D'Orbigny, 1846, For. Foss. Vien., p. 224, pl. 13. 
figs. 6-8. 
G. irregularis, D'Orb. ibid. p. 226, pl. 10. figs. 9, 10. 
Globulina discreta, Reuss, 1849, Denkschr. mathem.-natur. Cl. k. Akad. Wissensch. vol. i. P. 378, pl. 48. 
fig. 10. 
Guttulina cretacea, Alth, 1849, Haidinger's Abhandl. vol. iii. p. 262, pl. 13. fig. 14; Reuss, 1850, ib. 
vol. iv. p. 44, pl. 5. fig. 10. 
G. semiplana, Reuss, 1851, Zeitschr. deutsch. geol. Gesell. vol. iii. p- 82, pl. 6. fig. 48. 
Polymorphina communis, Jones, 1854, in Morris's Cat. Br. Foss. 2nd ed. p. 40. 
Spheroidina Parisiensis, Ehrenberg, 1854, pl. 27. figs. 23, 24. 
Guttulina robusta, Reuss, 1855, Sitzungsb. k. Akad. Wissensch. vol. xviii. p. 246, pl. 6. fig. 65. 
G. semiplana, Bornemann, 1855, Zeitschr. deutsch. geol. Gesellsch. vol. vii. p. 344. ; 
Polymorphina (Guttulina) communis, Egger, 1857, Neues Jahrb. für Min., epo 1857, p. 288, pl. 13. 
figs. 16-18. 
