FORAMINIFERA FROM THE NORTH ATLANTIC AND ARCTIC OCEANS. 357 
It can only be received as a varietal form of the typical Lagena sulcata , Walker and 
Jacob ; but, like other noticeable varieties of Foraminifera, it requires a distinctive 
binomial appellation. It is from Norway (MacAndrew and Barrett) ; found in mixed 
sands and muds dredged at various places between Drontheim and North Cape, and at 
depths varying from 30 to 200 fathoms ; of rare occurrence. It is very rare in deep 
water off Shetland, and not uncommon off the Northumberland coast (H. B. Brady). 
The exact counterpart in form, but somewhat of less size, occurs in the clay beneath 
the fen near Peterborough, but not in any abundance. A somewhat similar, large, two- 
mouthed Lagena is found in the Sponge-sand from Melbourne, Australia, and is rather 
common: it is even larger than our Arctic specimens; is never quite straight; and, 
instead of being covered with delicate costulee, is richly ornamented with pearl-like 
grains, profusely spread over the surface, hence we call it Lagena distoma-margaritifera , 
Plate XVIII. fig. 6. 
A smooth distomatous Lagena , of twice the size of the last mentioned, is not 
uncommon in the rich fossil Rhizopodal fauna so well worked out of the Crag of Sutton, 
Suffolk, by Mr. S. V. Wood, F.G.S. This Lagena of the Crag of Suffolk is the largest 
of the elongate Lagence that we know. 
Dr. Carpenter supposes that the elongate distomatous Lagence may be double La- 
gence joined by their bases (Introd. p. 157); and Professor A. E. Reuss suggests that they 
are separated chambers of Nodosarice or Lentalinoe (Sitzung. Ak.Wien, vol. xlvi. p. 315); 
but in these opinions we can by no means agree. Our L. distoma is grouped by Reuss 
( loc . cit. p. 331) with L. gracilis , Williamson ; but our description and figure show the 
distinctive features. 
Lagena sulcata , Walker and Jacob, Var. distorna-jjolita, nov. Plate XIII. fig. 21 (Arctic). 
Another elongate, fusiform, distomatous variety of Lagena (fig. 21), but smooth instead 
of costulate, occurs in the same Norway dredgings, and in the Red Sea (Pullen’s sound- 
ings), on the beach near Melbourne, at Swan River, on the Australian Coral-reefs, and 
on the Durham Coast (Brady), and of a large size (relatively) in the Crag of Suffolk. 
As fig. 20 represents a distomatous, striated, subcylindrical variety of L. sulcata , so 
fig. 21 is a smaller and smooth distomatous, but amphora-shaped, variety ; the former 
may be said to be, in one sense, a subvariety of L. striata , and the latter a subvariety 
of L. laevis. In the Norway dredgings it is smaller and rarer than L. distoma (fig. 20). 
Its two extremities are not nearly so equal as those of fig. 20, and the shell is not so 
cylindrical ; but in the hotter seas it is long and slender (Plate XVIII. fig. 8). W e 
term it L. distoma-polita. In some respects it has less departed, than L. distoma has, 
from the ordinary smooth flask-like forms, especially those which are somewhat pointed 
at the bulbous end, as Lagena apiculata, Reuss (Sitzungs. Akad. Wien, vol. xlvi. p. 1, 
figs. 4-8, 10, 11). In fact the subdivision of these varieties is artificial, and made only 
for the sake of convenience. 
3 c 
MDCCCLXV. 
