222 MESSRS. BRADY, PARKER, AND JONES 
acuminate, posterior acuminate or slightly rounded. Chambers elongate, arranged in 
two parallel series. Margins entire, scarcely depressed at the sutures. Aperture large, 
radiate. Surface smooth. Length 4; to 75 inch. 
As we have elsewhere observed, the figures given with Herr Roemer's paper on the 
North-German Tertiary Sands are often obscure, owing to their small size and poor 
execution. We have endeavoured (Plate XXXIX. figs. 6, a, b) to reproduce his drawing 
of P. eylindroides on a larger scale, as it seems to represent a useful subtype and is 
referred to constantly by German authors. Professor Williamson's P. lactea, var. acu- 
minata (Plate X XXIX. fig. 6, c) manifestly belongs to the same species. Reference to 
the two figures, placed side by side, will show that in all main features they are identical, 
the acuminate lower extremity of the latter being the only appreciable difference. Prof. 
Reuss, in his paper on the Tertiary Foraminifera of Northern and Central Germany, 
figures the shell with both ends somewhat rounded and a nearly circular transverse section, 
but other authorities agree in the more or less compressed contour indicated in Plate 
XXXIX. fig. 6,0. Dr. Gümbel describes, under the name of Guttulina strumosa, a shell 
somewhat akin to this species from the Streitberger sponge-bed (Jahreshefte des Vereins 
fur vaterländische Naturkunde in Württemberg, p. 227, pl. iv. figs. 13 «-14 b), but too ill- 
defined for absolute diagnosis. Its age (Jurassic) would, in the absence of distinctive 
characters, suggest relationship with the poorly grown Liassic forms, of which P. fusifor- 
mis is the best example. 
Distribution.—Fossil, in the North-German Tertiary sands and Septaria-clay. Recent, 
in Mr. Barlee's dredgings from Skye and some other more northern localities. 
PoLYMORPHINA OBLONGA, Williamson. (Plate XX XIX. figs. 7, a, b.) 
Polymorphina lactea, var. oblonga, Williamson, 1858, Rec. For. Gr. Br. p. 71, pl. 6. figs. 149, 149a; 
Alcock, 1865, Proc. Lit. & Phil. Soc. Manchester, vol. iv. p. 206. 
Characters.—Shell oblong, ovate, symmetrical, tapering but little, rounded at both 
extremities, compressed ; consisting of numerous, erect, narrow, oblong segments extend- 
ing nearly to the upper extremity of the shell, and scarcely overlapping at all laterally, so 
that the earlier segments are left partly uncovered. Septal plane narrow, oblong, convex. 
Septal lines scarcely depressed, but distinct. Orifice surrounded by a conspicuous corona 
of radiating grooves. Surface smooth. Length 35 inch. 
The present species must not be confounded with the Polymorphina oblonga of D'Or- 
bigny (* Vienna Basin,’ pl. xii. figs. 29-31), which is an elongate many-chambered Uvige- 
rine form, closely related to, if not identical with, P. Soldanü. Again, the Polymorphina 
(Globulina) oblonga of Roemer (Neues Jahrbuch, 1838, pl. iii. fig. 34) belongs rather to the 
well-known P. communis. Neither of these varieties has been recognized as a leading 
form by subsequent rhizopodists ; hence there will be no inconvenience in retaining Prof. 
Williamson's name for the well-marked variety to which it was applied by him. 
We have little to add to the description above given, which is quoted, in the main, from 
Professor Williamson's notes. It represents one of the most symmetrical varieties of the 
genus; and its long erect chambers, strongly marked terminal orifice, and generally su 
translucent shell are sufficiently distinctive characters for its recognition. 
