MR. H. B. BRADY ON THE RHIZOPODAL FAUNA OF THE SHETLANDS. 469 
No. 72. DiscorBINA BERTHELOTI, d’Orb., sp. (Plate XLVIII. fig. 10.) 
Rosalina Bertheloti *, d’Orb. For. des iles Canaries, pl. 1. figs. 28-30. 
A delicate flattened variety of Discorbina turbo, d'Orb., sp., having the central chambers 
depressed so as to form a sort of umbilical disk. Viewed from underneath, the chambers 
are seen to overlap each other successively, the smaller in front of the larger, and the 
aperture is hidden by the spreading growth of the large terminal chamber. Each 
chamber has a slightly marked border, and the whole shell is covered with minute incon- 
5016110115 perforations. Diameter 1i; inch. 
No. 74. PLANORBULINA HarDINGERII, d'Orb., sp. (Plate XLVIII. fig. 11.) 
The artificial system of classification adopted by d'Orbigny with reference to the 
Foraminifera is never more at fault than when dealing with the numerous varieties of 
Planorbulina, Discorbina, &c., which he has grouped together in the genus Rotalia. 
Most of his species are quite worthless, some of them not even representing varietal 
distinctions of sufficient permanence to notice. In rearranging this motley assemblage 
of forms, Messrs. Parker and Jones propose to keep Planorbulina farcta (Fichtel and 
Moll, sp.) as the type of a genus; and if this name is confined to the bold large-pored 
form growing attached, P. Haidingerii becomes a convenient subspecific term for the 
round-edged form growing free, and P. Ungeriana is applicable to the unattached, feebler, 
thin-edged varieties. 
A considerable number of specimens of P. Haidingerii have been found in these sands, 
of average size, though not so bold and thick in contour as they occur in warmer seas 
and in some tertiary deposits, but resembling more d'Orbigny's figure of Rotalia Akne- 
riana, one of the subvarietal forms included under P. Haidingeriit. Diameter 3y inch. 
(See For. Foss. Bas. Tert. Vien. pl. 8. figs. 7-9, 13-15, &c.) 
No. 75. PrANORBULINA UNGERIANA, d'Orb.sp. (Plate XLVIII. fig. 12.) 
A small Planorbulina growing unattached, more delicate than the last-named species. 
It has a deep central umbilicus, and the chambers are extended at their outer edge into 
à sharp keel, giving the appearance of a narrow border running round the shell. 
Diameter حلب‎ inch. (See For. Foss. Bas. Tert. Vien. pl. 8. figs. 16-18, &e.) 
- 
No. 77. ANOMALINA CORONATA, P. & J. (Plate XLVIII. fig. 13.) 
My attention was first drawn to this shell in the Shetland dredgings by Mr. Waller, 
and I have since found it in considerable quantity in the material brought home by 
Mr. Jeffr eys last year, taken from a depth of 85 and 90 fathoms. It may be E x 
as à subsymmetrical biconcave Planorbulina growing unattached. It seams to be 
common at all depths on the Norwegian coast, and is plentiful in the Mediterranean 
* This species has the name of Rosalina Bertheloti in the text, whilst R. Berthelotiana appears on P n 
of oversight not uncommon in d'Orbigny's works. As it seems probable that the author would "o z is ~ r 
tion of the species the name he intended it to bear, the former has been adopted. The same course as vods : 
s ee to Nonionina stelligera, the last-named species on my list, which is called N. stellifera on ¢ Uirbigny 
p 
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VOL. XXIV. 
