232 MESSRS. BRADY, PARKER, AND JONES 
in any other locality, we can scarcely suppose that its distribution is confined to the 
Australasian seas. 
POLYMORPHINA TRIGONULA, Reuss, sp. (Plate XL. figs. 16, a, 5.) 
Guttulina trigonula, Reuss, 1845, Verstein. bóhm. Kreid. 1 Abtheil. pp. 40, 110, pl. 13. fig. 84. 
Characters.—Shell oblong transversely, truncate at the base. Anterior extremity ob- 
tuse, pointed. Chambers numerous, turgid. Orifice radiate. Surface smooth. Long 
diameter (at the base) 3; inch. 
Professor Reuss, in his work on the Cretaceous System of Bohemia, describes and 
figures a curious and somewhat anomalous Polymorphina under the name Guttulina tri- 
gonula. We are unable to associate any specimens, recent or fossil, that have come under 
our notice with his description of the species, and are therefore content to copy his figure 
on a somewhat larger scale than the original, and adapt our description to it. Tt appears 
to represent a variety allied to P. communis, and differing chiefly in its truncate, some- 
what three-sided base. "Were a good specimen of this latter species cut across in its 
widest part, we should have a near approach to the characters indicated in the drawing. 
Another squat variety mentioned in the same work, P. glomerata, may possibly pertain to 
the same subtypical division; but the insufficiency of the figures has left us in so much 
doubt, that we have preferred to place it provisionally under P. communis, p. 224. 
Distribution.—The geological stage and locality given by Reuss are the Plánermergel 
of Luschitz in Bohemia. 
PoLYMORPHINA THOUINI, D'Orbigny. (Plate XL. fig. 17.) 
Polymorphina Thouini, D'Orbigny, 1826, Ann. Sc. Nat. vol. vii. p. 265, no. 8; Modèle no. 23. 
P. asparagus, Ehrenberg, 1854, Mikrogeologie, pl. 27. fig. 14. 
P. turio, id. ibid. pl. 28. fig. 27. 
Bigenerina Crete, id. ibid. pl. 28. fig. 21. 
B. acanthopora, id. ibid. pl. 28. fig. 22. 
‘Proroporus Crete, id. ibid. pl. 27. fig. 29, and pl. 28. fig. 20. 
P. Siculus, id. ibid. pl. 26. fig. 18. 
Sagrina longirostris, id. ibid. pl. 32. fig. 23. 
Vaginulina obscura, id. ibid. pl. 26. fig. 27. 
Polymorphina Thouini, Parker and Jones, 1860, Quart. Journ. Geol. Soc. vol. xvi. p. 302. (Table). 
P. pupiformis (in part), Terquem, 1864, 4»* Mém. sur les Foram. du Lias, p. 524, pl. 13. figs. 23, 26, 
29, &c. | 
P. Thouini, Parker, Jones, and Brady, 1865, Ann. & Mag. Nat. Hist. 3rd Ser. vol. xvi. p. 22, E 2. 
fig. 49; Jones, Parker, and Brady, 1866, Monogr. Crag Foram. pl. 1. fig. 59. 
-Guttulina, sp., von Schlicht, 1869, Foram. Septar. Pietzpuhl, p. 467, pl. 25. figs. 14, 15. 
Characters.—Shell attenuate, subeylindrical, slightly constricted at the septal lines. 
Anterior extremity acute; posterior rounded. Chambers elongate, ham ces erect. slightly 
“ventricose. Orifice round, central. Surface smooth. “Length jy to 5 inch. 
. Of the very long, many-chambered Polymorphinæ, perhaps P. Thouini is the best- 
defined ie yet it does not appear to have been generally adopted. t represents a 
