EORAMINIFERA FROM THE NORTH ATLANTIC AND ARCTIC OCEANS. 407 
Lituola nautiloidea, Lamarck, Var. globigeriniformis, nov. Plate XV. figs. 46, 47 
(Arctic) ; Plate XVII. figs. 96-98 (North Atlantic). 
In this low form of Lituola the chambers are subglobular and agglomerated, pre- 
senting an isomorph of Grlobigerina ; the somewhat scanty and rusty-red shell-substance 
cementing the sand-grains is characteristic, as in Lituola nautiloidea proper. 
Lituola globigeriniformis is small and common at the Hunde Islands (Dr. Suther- 
land) from 30 to 70 fathoms. It is small also in Baffin’s Bay; being common at 
75° 10' lat., 60° 12' long., and rare at 75° 25' lat., 60° long. (314 fathoms), and 75° lat., 
59° 40' long. (220 fathoms). 
In the North Atlantic it is rare and middle-sized at 1660 fathoms in the “ Boreal ” 
portion of the abyss ; and very rare and small north of the Bank at 145 and 954 
fathoms. It is figured by Dr. Wallich in ‘The North-Atlantic Sea-bed,’ pi. 6. fig. 22. 
L. globigeriniformis , Parker and Jones, is common, but small, in the Mediterranean; 
in our paper in the Quart. Journ. Geol. Soc. vol. xvi. Table, p. 302, it is referred to as 
“ L. pelagica , D’Orb., sp.,” as we then mistook the yellowish acerose Globigerina named 
“ Nonionina pelagica ” by D’Orbigny for our Lituola. It is present in the Bed Sea, the 
Indian Ocean, and the South Atlantic. 
Lituola nautiloidea , Lamarck, Var. Scorpiurus , Montfort, sp. Plate XV. figs. 48 a, 
48 b (Arctic). 
Lituola Scorpiurus, Montfort, sp., is a simple, linear, slightly curved, and, as it were, 
abortive variety of L. nautiloidea , Lamarck (see Ann. Nat. Hist. 3 ser. vol. v. p. 297 ; 
and Carpenter’s ‘ Introd. Foram.’ p. 143). It is of very common occurrence in shelly 
deposits, recent and fossil. 
It is common and large at the Hunde Islands, 25 to 40 fathoms ; common and middle- 
sized in Baffin’s Bay, 75° 10' lat., 60° 12' long. ; and rather common and very large at 
150 fathoms, 76° 30' lat., 77° 52' long. 
The late Mr. L. Barrett obtained large specimens of L. Scorpiurus in deep water off 
Jamaica, of very large size, labyrinthic, and passing into L. Soldanii , Parker and Jones. 
L. Scorpiurus lives also in the Adriatic, the North and South Atlantic, and in the Austra- 
lian seas. 
Genus Trochammina. 
Trochammina squamata , Parker and Jones. Plate XV. figs. 30, 31a, 315, 31c (Arctic). 
This is the subvesicular Rotaliform Trochammina (Quart. Journ. Geol. Soc. vol. xvi. 
p. 305), having lunate, flattened chambers, several in a whorl, and regularly increasing 
with the progress of growth ; it much resembles those flatter varieties of JDiscorbina 
Turbo which are intermediate between L, globularis and 1). rosacea , but it has an 
arenaceous shell ; it is also like some little scale-like varieties of Valvulina triangu- 
laris ; but the latter have only three chambers in a whorl, and are more coarsely 
sandy. 
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