436 Mr. H. B. Brady on the Reticularia and 
contour. They are minute, thin-shelled, and obscurely trian- 
gular; but the segments are more inflated than in the Uvige- 
rina angulosa of Williamson, and the surface ornamentation 
is very partially distributed. They differ almost as much from 
the typical U. pygmea* ; but the points of divergence are 
such as may and probably have been brought about by the 
different life-conditions of a polar climate. Such specimens 
may be accepted as representing a starved or impoverished 
variety of the typical form rather than a distinct species. 
38. Bulimina elegantissima, D’Orbigny. (Pl. XXI. fig. 12.) 
Very rare, and not of the precise contour by which the 
species is usually recognized: the segments are similarly 
arranged ; but they are relatively shorter, and there are fewer 
in each convolution, as indicated in the figure. 
41. Textularia biformis, Parker & Jones. (Pl. XX. fig. 8.) 
A very minute, thin-shelled arenaceous species. Messrs. 
Parker and Jones’s figures are on somewhat too small a 
scale to show the conformation of the test quite distinctly. 
The largest of the Polar specimens is but little over 7, inch 
(0°37 millim.) in length. 
42. Verneuilina polystropha, Reuss. (Pl. XX. fig. 9, a-c.) 
Small specimens of this arenaceous triserial T'extularian are 
common in one or two of the localities. They are often of 
the slender, more elegant form delineated in fig. 9, a. 
45. Pulvinulina Karsteni, Reuss. (Pl. XXI. fig. 11, a-c.) 
Over extensive areas, in almost every portion of the globe, 
the floor of the ocean is largely composed of the shells of 
Foraminifera belonging to two genera, G'lobigerina and Pul- 
vinulina; but for the most part these are merely the dead 
skeletons of pelagic species which, when living, inhabit a 
layer of water that, comparatively speaking, may be regarded 
as superficial; but it is far otherwise in these high latitudes. 
A single chance specimen of Pulvinulina Micheliniana is 
the only representative of the pelagic section of the genus 
found in the entire collection of soundings; whilst Pulvinulina 
Karstent, one of the many species that, so far as we know, 
live on the sea-bottom, is present everywhere, and the size 
and condition of the specimens indicate that it is at home in 
these northern regions. 
* Compare Williamson’s figures, Rec. For. Gt. Br. pl. 5. figs. 188-140, 
with fig. 7, a, 6, of the present paper. 
