EEPOET OUST THE FOEAMINIFEEA. 
565 
are arranged with regularity in two alternating series, the last pair occupying two-tliirds 
of the visible shell ; the sutures are complanate and are marked by fine lines without 
external depressions. D’Orbigny’s figures ( loc . cit.), scarcely convey a correct impression 
of the appearance of the shell, at any rate of recent specimens, which are distinguished 
primarily by their smooth, convex, lateral faces and flush sutures, and by the very large 
size of the final segments. In the Monograph of the Genus Polymorphina (Trans. 
Linn. Soc. Lond., vol. xxvii. p. 227) the species was erroneously placed in the synonymy 
of Polymorphina compressa. 
Living examples of Polymorphina ovata have been obtained from only one Challenger 
Station — off Culebra Island, West Indies, 390 fathoms. 
The habitat given with the original specimens is the Miocene of Nussdorf, near Vienna. 
Reuss furnishes the following additional localities, all referrible to Middle Tertiary 
formations, — the Salt-clay of Wieliczka in Galicia, the Leithakalk of the Vienna Basin, 
and the Gypsum-bearing marl of Kathrein in Moravia. 
Polymorphina compressa, d’Orbigny (PL LXXII. figs, 9-11). 
“ Polymorpha Subovalia,” Soldani, 1791, Testaceograpliia, vol. i. pt. 2, p, 114, pi, cxiv. figs. F, I, 
pi, cxv. fig. N; pi. cxvi. figs. V, X, Ac. 
Polymorphina compressa , d’Orbigny, 1846, For. Foss. Yien,, p. 233, pi. xii. figs. 32-34. 
„ prisca, Ehrenberg, 1854, 
Mikrogeologie, 
pi. xxiv. fig. 34. 
Grammostomum gracile, 
Id, 
Ibid, ■ 
pi, xxvii, fig. 25, 
Loxostomum vorax, 
Id, 
Ibid. 
pi. xxviii. fig. 24. 
Bigenerina apiculata, 
Id, 
Ibid, 
pi. xxviii. fig. 23. 
„ libanotica, 
Id. 
Ibid. 
pi. xxv. I. A., figs, 25, 26. 
Pleurites turgens, 
Id, 
Ibid. 
pi. xxxi. fig, 37. 
,, ? americanus', 
Id. 
Ibid, 
pL xxxii. II,, fig- 20. 
Polymorphina indgnis, Eeuss, 1855, Sitzungsb. d. k. Akad. "Wiss. Wien, vol. xviii. p. 248, pi. vii. 
figs. 74, 75. 
,, media, Egger, 1857, Neues Jalirb. fur Min., &c,, p, 287, pi. xiii. figs. 28, 29. 
Globalina discreta, Eeuss, 1864, Sitzungsb, d. k. Akad. Wiss. Wien, vol. 1. p. 468, pi. iii. 
fig. 3. 
Guttvlina rohusta, Id. Ibid. p. 470, pi. iii. figs. 
5-7. 
Polymorphina angustata, Terquem, 1864, Foram, du Lias, 4 1>,re mem., p. 296, pi. xii. 
figs. 33, 34. 
,, sinuata, Id, Ibid. p. 298, pi. xii. fig. 48. 
,, sacculus, Stache, 1865, Novara-Exped., geol. Theil, vol. i. pt. 2, Palaont., p. 259, 
pi. xxiv. fig. 6. 
„ incavata, Id. Ibid. p. 260, pi. xxiv. fig. 7. 
,, ladea, var. compressa (pars), Parker and Jones, 1865, Phil. Trans., vol. civ. 
p. 361, pi. xiii. figs. 47, 49, 51. 
,, compressa, Brady, Parker, and Jones, 1870, Trans. Linn, Soc. Lond., vol. xxvii. 
p. 227, pi. xl. fig. 12, a-f. 
(ZOOL. CHALL. EXP. — PART XXII. 1884.) Y 72 
