FORAMINIFERA FROM THE NORTH ATLANTIC AND ARCTIC OCEANS. 411 
rare at 30 to 40 fathoms, common at 60 to 70 fathoms. Is rare and middle-sized in 
Baffin’s Bay, 75° .10' lat., 60° 12' long. (Parry). 
Miliola ( Quinqueloculina ) Ferussacii, D’Orbigny. Plate XV. figs. 36 a, 36 b, 36 c 
(Arctic); 
Quinqueloculina Ferussacii, D’Orb. (Modeles, No. 32), is a coarsely ribbed or plicated 
form of Q. Seminulum (the type of the Miliolce) ; it is very variable, and is known by a 
host of names. 
It is found in some abundance in the European and other seas, and also in the Ter- 
tiary deposits. 
At the Hunde Islands it is common and middle-sized at from 30 to 70 fathoms. 
Miliola ( Quinqueloculina ) oblonga, Montagu, sp. Plate XV. figs. 34, 41 (Arctic); 
Plate XVII. figs. 85 a, 85 b , 86 a, 86 b (North Atlantic). 
When Miliola Seminulum , Linn., sp., is contracted in its growth, it produces very 
variable forms, in which the normal lateral exposure of the chambers does not take 
place ; and somewhat elongate, oblong, Quinqueloculine and Triloculine forms are the 
result, such as Q. oblonga , Montagu, sp., which is often Triloculine in aspect, and has 
been registered as Triloculina oblonga by D’Orbigny and others (see Annals Nat. Hist. 
2 ser. vol. xix. p. 300); but it often has indications of its being really a poorly developed 
Quinqueloculine Miliola. Quinque- and Tri-loculince are excessively variable shells, 
both as to shape and ornament, and are amongst the most common Foraminifers in all 
latitudes and depths. We have two genuine Triloculince in the Arctic dredgings (Hunde 
Islands); but the so-called Triloculina oblonga is an ill-grown Quinqueloculina. It 
usually abounds in company with the typical Miliola Seminulum ; the largest specimens 
we know of are fossil in the Lower Crag of Sutton, Suffolk. It is one of the most 
abundant of the Quinqueloculine varieties. 
This feeble Quinqueloculina Seminulum, with a Triloculine aspect, is common and large 
in most of the Norway dredgings (MacAndrew and Barrett) ; common and small at the 
Hunde Islands (Sutherland) at 25 to 30 fathoms. 
We have it very rare and very small from 2330 fathoms in the North Atlantic. Figs. 
14 & 16, in pi. 5 of Dr. Wallich’s ‘ North-Atlantic Sea-bed,’ also illustrate this variety. 
Miliola ( Quinqueloculina ) subrotunda, Montagu, sp. Plate XV. figs. 38 a, 38 b (Arctic). 
A small, roundish, biconvex variety of Miliola Seminulum, Linn., often accompanying 
other Miliolce. It may be said to be a dwarf of the variety Q secans, D’Orb., and is very 
widely distributed. 
At the Hunde Islands (Dr. Sutherland’s dredgings) it is common at 60 to 70 fathoms. 
Miliola ( Quinqueloculina ) tenuis, Czjzek. Plate XVII. fig. 84 (North Atlantic). 
A nearly complanate, but often curved, thin, more or less unsymmetrical Quinquelo- 
