402 
ME. W. K. PAEKEE AND PEOEESSOE T. E. JONES ON SOME 
Polystomella crispa, Linn., sp., Var. striatopunctata, Fichtel and Moll, sp. Plate XIV. 
figs. 31-34 (Arctic) ; Plate XVII. fig. 60 a , 60 b (North Atlantic). 
This is a smooth, round-edged, Nonionine shell, variable in its thickness and in the 
number of bridges over the septal furrows. The aperture is more or less divided by bars, 
and may have supplemental pores. 
Individuals presenting two stages in this variety are described and figured by William- 
son under the name of Polystomella umbilicatula and P. umbilicatula , var. incerta, 
Monograph, p. 42, &c., pi. 3. figs. 81, 82, 82 a. Some of our figures (Plate XIV. figs. 
32-34) show but little of the septal markings ; but in fig. 31, and Plate XVII. fig. 60, 
these are much more apparent, for the furrows are more distinctly bridged over by the 
posterior crenulation and retral processes of the chambers, and conspicuous fossettes are 
formed. Schultze has also illustrated this form (Ehrenberg’s Geoponus Stella-borealis , 
well figured by him in the Berlin Acad. Trans. 1841) and some near allies in his 4 Org. 
Polyth.’ pi. 6. figs. 1-9 [Polystomella gibba, P. Stella-borealis , and P. venusta). 
P. striatopunctata is widely distributed in both warm and cold seas, but not in deep 
water. It occurs in Tertiary and Post-tertiary deposits, sometimes abundantly, and is a 
characteristic fossil of the Post-pliocene clays of Canada (Dawson) and of the coast of 
Scotland (Quart. Journ. Geol. Soc. vol. xiv. p. 521, note). 
We have P. striatopunctata , rather rare and small in the mixed Norwegian sands 
(MacAndrew and Barrett’s dredgings) ; in all Dr. Sutherland’s dredgings from the 
Hunde Islands (25-70 fathoms), where it is usually common and large. Also from 
Baffin’s Bay (Parry), lat. 75° 10', long. 60° 12', rare and very small; lat. 76° 30', long. 
77° 52', 150 fathoms, common and middle-sized; lat. 75°, long. 59° 40', 220 fathoms, 
very rare and very small. In the North Atlantic it is found on the eastern marginal 
plateau at 43 fathoms common and small ; at 78 fathoms very rare and very small ; at 
223 fathoms rare and small; and north of the Newfoundland Bank it occurs rare and 
small at 145 fathoms, very rare and very small at 161, rather common and middle-sized 
at 740 ; rather rare and small at 725; rare and small at 954 fathoms. 
Polystomella crispa , Linn., sp., Var. (Nonionina) Fab a, Fichtel and Moll, sp. Plate XIV. 
fig. 36 (Arctic). 
Nonionina Faba is a small, delicate, ovate-oblong shell, with the later chambers 
much larger than those first formed. The septal furrows are bridged by little processes 
from the advancing chambers, and the septal aperture is barred or subdivided. In these 
latter features N. Faba shows an advance of structure beyond N. Scapha towards Poly- 
stomella proper, in which the septa are cribriform and the surface of the shell fene- 
strated. 
It occurs both fossil and recent in the Mediterranean area. We have it from 
the Hunde Islands, where it is rather rare and of middle size at from 25 to 30 fathoms ; 
rather common and large at 30 to 40; and common and large at 60 to 70 fathoms 
(Sutherland’s dredgings). 
N. Faba among these delicate oblong Nonionina, and P. striatopunctata among the 
