242 MESSRS. BRADY, PARKER, AND JONES 
of the more striking specimens will be found in our *Monograph of the Crag Fora- 
minifera.' , 
Both the form and arrangement of the chambers are very variable; and from this cir- 
cumstance it is difficult to assign characters to the species. with any amount of precision. 
The shell is sometimes flat and Textularian; and then the chambers are regular and 
biserial as in Plate XLI. fig. 33,0. A chance specimen of this sort, without surface- 
markings, could scarcely be distinguished from P. complanata, except on the ground of 
difference in size. But more frequently the chambers are irregular both in form and 
combination, and the lines of septation are only marked by slight unequal depressions on 
the surface of the test. Examples in this condition often resemble Pcompressa ; but the 
superficial ornament, usually present to a greater or less extent, will generally serve asa 
means of diagnosis. 
Distribution.—Mr. Searles Wood's gatherings from the Crag at Sutton, near Colchester, 
represent all we know of either the geological or geographical range of the species. 
PoLYMORPHINA ORNATA, Karrer. (Plate XLI. figs. 34, a, b.) 
Polymorphina ornata, Karrer, 1868, Sitzungsb. k. Akad. Wissensch. vol, lvii. p. 175, pl. 4. fig. 10. 
Characters.—Shell oval or subspherical, having about five visible chambers ; septal 
lines slightly depressed. Surface having an ornamentation consisting of slightly raised 
warts or tubercles in more or less regular lines parallel to the long axis of the shell. 
Orifice stellate. Length 3; inch. 
We adopt this pretty little variety from our friend Herr Karrer’s recently published 
memoir on the ** Miocene Foraminifera of Kostej in the Banat.” The nature of the orna- 
mentation (elongated clear beads of exogenous shell-substance) is obviously similar to 
that of some of our specimens of P. frondiformis, though more regular in point of 
arrangement. The shell, too, is much smaller than our Crag form and is Globuline in its 
general contour. It bears also many points of resemblance to the fine subcostate speci- 
mens of P. myristiformis obtained by Mr. Robertson on the Devonshire coast, as will be 
seen by a comparison of the figures. The “beads” in the one case might be regarded as 
coste broken up at regular intervals, whilst in the other the interruption is irregular 
and less frequent. 
Distribution —The author gives no particulars as to its ; distribution: we infer, how- 
ever, that it occurs in the Miocene beds of Kostej, in the Banat, Austria. 
PoLYMORPHINA TUBERCULATA, D'Orbigny, sp. (Plate XLI. fig. 35, a-d.) - 
Globulina tuberculata, D'Orbigny, 1846, For. Foss. Vien. p. 230, pl. 18, figs. 21, 22. 
Polymorphina (Globulina) tuberculata, Egger, 1857, Neues Jahrb. für Min., J ahrg. eii p. 292, pl. xiv. 
7,8 
fq Ad Reuss, 1862, Sitz. Akad. Wiss. Wien, vol. xlvi. p. 79. 
Polymorphina tuberculata, Karrer, 1868, ibid. vol. lviii, p. 173. — 
Characters.—Shell ovate or subspherical. Anterior dota more or less acute, pos- 
terior rounded. Surface beset with tubercles of unequal size and inte ere 
fermi dun ‘Aperture radiate, - Length ¿5 to 5 inch. . 
