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ME. W. K. PAEKEE AND PEOEESSOE T. E. JONES ON SOME 
Foraminifera.’ To D’Orbigny and Reuss, then, references will be continually made in 
this memoir for illustrations of the species and varieties ; and the titles and dates of 
their works, and of those of other authors treating of Foraminifera, are given in the 
books and memoirs above mentioned, in which all the species adopted by the older 
authors (Linne, Gmelin, Walker, Jacob, Montagu, Fichtel, Moll, Lamarck, 
de Montfort, de Blainville, and Defrance) have been critically determined. 
If ever the Foraminifera of all seas come to be collected and examined with care, 
there is little doubt that they will afford to the Naturalist as satisfactory results as the 
bathymetrical study of mollusks affords ; they will be perhaps even more useful to the 
Geologist, in aiding him to form correct notions as to the depth and other conditions of 
water in which strata have been formed ; whilst the accurate comparison of the long- 
enduring Foraminiferal species of past and of present time, with their ever-varying 
modifications, according to climate, depth, and food, cannot fail to be a source of in- 
struction to the Biologist. 
II. Description of Species and Varieties. 
In the following list, the species and varieties described in this memoir are enume- 
rated in their natural order as nearly as their nature permits ; the more important of 
the typical forms not represented in the Arctic and North- Atlantic fauna, but required 
to complete the series as a natural group, being added in brackets. 
List of Genera, Species, and Varieties of Foraminifera from the Arctic and 
North Atlantic Oceans. 
Genus Nodosakina. 
[Species. Nodosarina (Marginulina) Eaphanus.] Arctic. 
Subspecies. N. (Nodosaria) Rapbanus 
Variety. N. (Nodosaria) scalaris 
N. (Glandulina) laevigata Plate XIII. fig. 1. 
N. (Nodosaria) Radicula Plate XIII. figs. 2-7. 
N. (Dentalina) communis Plate XIII. fig. 10. 
Subvariety. N. (D.) consobrina 
N. (D.) pauperata Plate XIII. figs. 8, 9. 
N. (D.) guttifera PlateXIII.fig.il. 
[Subspecies. N. (Yaginulina) Legumen.] 
Variety. N. (Y.) linearis Plate XIII. figs. 12, 13. 
[Species. Nodosarina (Marginulina) Eaphanus.] 
Variety. N. (M.) Lituus Plate XIII. fig. 14. 
[Subspecies. N. (Cristellaria) Calcar.] 
Variety. N. (C.) Crepidula Plate XIII. figs. 15, 16. 
N. (C.) cultrata Plate XIII. figs. 17, 18. 
N. (C.) rotulata Plate XIII. fig. 19. 
North Atlantic. 
Plate XYI. fig. 1. 
Plate XYI. fig. 2. 
Plate XYI. fig. 3. 
Plate XYI. fig. 4. 
Plate XYI. fig. 5. 
