FORAMINIFERA FROM THE NORTH ATLANTIC AND ARCTIC OCEANS. 369 
Genus Speleroidixa. 
Sphcefoidina bulloides, D’Orbigny, sp. Plate XVI. fig. 52 (North Atlantic). 
This peculiar species (of which Sph. dehiscens is another variety) is related to Globi- 
gerino ; and, together with Pullenia , Orbulina , and Globigerina , essentially of deep- 
water habits, is small and rare in the North Atlantic, but large in the Tropics. 
Sphceroidina has a small spire, somewhat irregularly wound, the vesicular chambers (of 
which only three or four are visible) hiding the spiral arrangement. Reuss has figured 
many specimens ( Sph.Austriaca ) in pi. 51, Denkschr. K. Akad. Wissen. Wien, vol. i. 1850. 
Sphceroidina dehiscens , Parker and Jones, is largish, thick-shelled ; the chambers not 
closely applied, and their edges roughly everted and jagged (Plate XIX. fig. 5). 
Sph. bulloides is rare and small at 223 fathoms on the marginal plateau off Ireland; 
very rare and very small at 2330 fathoms in mid-ocean. 
In the Mediterranean it occurs at 320 fathoms, in the Red Sea at 372, in the Tropical 
Atlantic at 1080, in the Southern Atlantic at 260 and 940, and in the Indian Ocean at 
2200 fathoms. 
Genus Textularia. 
Textularia agglutinans , D’Orbigny. Plate XV. fig. 21 (Arctic). 
Textularia agglutinans , D’Orbig. (Foram. Cuba, p. 144, pi. 1. fig. 17, 18, 32-34), in 
its ordinary and moderately developed condition, gives a fuller idea of the species than 
any other variety. 
We have it in the mixed sands from Norway rather common and of middle size; and 
at the Hunde Islands it is small, rare at 30-40 fathoms, rather common at 25-30 
fathoms. 
Textularia agglutinans is world-wide ; and has its representatives in many Tertiary 
and Secondary strata. 
Textularia agglutinans , Var. abbreviata, D’Orbigny. Plate XVII. figs. 76 a, 76 £ (North 
Atlantic). 
T. abbreviata, D’Orb. (For. Foss. Vien. p. 249, pi. 15. figs. 7-12), is a short form, 
intermediate to T. gibbosa, D’Orb. Modeles, No. 28, and T. agglutinans, D’Orb., and 
smaller than either ; but, like them, it is sandy. 
We have it from the marginal plateau of the Atlantic off Ireland, where it is common 
and middle-sized at 43 and 78 fathoms ; rather common and middle-sized at 90 fathoms ; 
rare and small at 223 fathoms; rather common and small at 415 fathoms. 
T. abbreviata has much the same range as its type T. agglutinans. 
Textularia agglutinans , D’Orbigny, Var. Sagittula , Defrance. Plate XVII. figs. 77 a, 
77 b (North Atlantic). 
T. Sagittula , Defrance (see ‘Annals Nat. Hist.’ 3rd ser. vol. xi. p. 91, &c.), is the 
common, often small, sandy, triangular variety of T. agglutinans , D’Orb. 
