FORAMINIFERA FROM THE NORTH ATLANTIC AND ARCTIC OCEANS. 349 
walled. It may be said to be a feeble form connecting L. Icevis with swollen varieties 
of L. marginata. 
L. globosa comes from 30 to 40 fathoms, and from 60 to 70 fathoms at the Hunde 
Islands (Dr. Sutherland) ; and in both dredgings it is rather common and of middling 
size. Also from Baffin’s Bay, lat. 75° 10' N., long. 60° 12' W. (Parry) ; here it seems to 
be rare, but is of large size, — a curious fact, in contrast with the occurrence of equally 
large individuals of this variety at very great depths (1080 fathoms) in the tropical 
Atlantic (lat. 2° 20' N., long. 28° 44' W.). 
This also is a world-wide and very common Lageno , as we may see by Table VII. 
Professor Reuss has it fossil from the Chalk of Maestricht and of Lemberg, from the 
Septarian Clay of Pietzpuhl, the Salt-clay of Wieliczka, and the Crag of Antwerp 
(Monogr. Lagen. p. 318). It is of good size and rather common in the English Crag 
also. 
L. globosa was figured and described by Walker and Boys, but not named by Walker 
and Jacob in Kanmacher’s edition of Adam’s ‘Essays on the Microscope,’ where the 
specific names given by Walker and Jacob are recorded. It was named by Montagu, 
‘Test. Brit.’ p. 523. 
Plate XYI. figs. 10 #, 10 b (North Atlantic). 
Equivalent to fig. 37 of Plate XIII., but having more neck, and like figs. 30 & 31 
(L. sulcata ) in outline and in thickness of neck. 
Rare and large at 415 fathoms, lat. 52° 8', long. 12° 31', North Atlantic. 
Lagena sulcata , Walker and Jacob, Var. Icevis *, Montagu. Plate XIII. fig. 22 (Arctic); 
Plate XYI. fig. 9 a (North Atlantic). 
Fig. 22 is the common, smooth, flask-shaped Lagena of authors. In this specimen 
pseudopodial passages are crowded about the lower third of the shell, the upper two- 
thirds being destitute of such foramina. We have observed that in Lagence such perfo- 
rations occur only when the shell is of a certain thickness, considerable tracts of the 
shell-wall being often extremely thin and imperforate. In the very small-ribbed varie- 
ties (such as figs. 25-27) perforations are arranged in a row on each side of the costa, 
where its base is thick ( L . striatopunctata). In the closely allied Entosolenian L. mar- 
ginata also (as in fig. 44), perforations occur principally along the thickened margins, 
occasionally as a broad band ; though sometimes (as in fig. 42) they are also scattered 
sparsely over the whole shell. 
This is from the mixed sands from Norway above alluded to. It is world-wide, often 
found at considerable depths, but shallow water appears to be its favourite habitat. In 
the fossil state this smooth variety is very abundant in the Post-pliocene clays of Lincoln- 
* Taking this as the type of Lagena, Williamson thought that “ laevis ” was not an appropriate name for a 
shell that is often ornamented, and substituted the term “ vulgaris” ; this unnecessary change has been unfor- 
tunately adopted by Reuss (Sitzungsb. Ak. Wien, vol. xlvi. p. 321). 
MDCCCLXV. 3 B 
