FORAMINIFERA FROM THE NORTH ATLANTIC AND ARCTIC OCEANS. 419 
F w 
Fig, 
F 
F 
F 
F 
F 
F 
F 
Fig 
is 1 . 80, 
81. 
lg. 82. 
83, 
84. 
85, 
86, a, b. 
87. 
88 . 
89, 
a, b. Bigenerina Nodosaria, L'Orbigny. 
Bigenerina digitata, L'Orbigny. 
Spirolocalina planulata, Lamarck, 
a, b. Spiroloculina limbata, L'Orbigny. 
Quinqueloculina tenuis, Czjzek. 
° ' ^Quinqueloculina oblonga, Montagu. 
Quinqueloculina Seminulum, Linne. 
Biloculina elongata, L'Orbigny. 
a, b. Biloculina depressa, L'Orbigny. 
Fig. 
90.) 
Fig. 
91./ 
Fig. 
92. 
Fig. 
93. 
Fig. 
94. 
Fig. 
95. , 
Fig. 
96. | 
Fig. 
97. 
Fig. 
98. J 
Biloculina elongata, L'Orbigny. 
Lituola Canariensis, L'Orbigny. 
L. 
Lituola globigeriniformis, Parker and Jones. 
PLATE XVIII. (MISCELLANEOUS FORAMINIFERA.) 
[Figures 15-18 are magnified 30 diameters; all the rest are magnified 60 diameters 
(excepting fig. 6 b, 200 diameters.)]. 
Fig. 1, a, b. Lagena trigono-marginata, Parker and Jones. A rare form, from the inside 
of an Eocene Tertiary shell from Grignon*. It is an isomorph of the tri- 
gonal Nodosarince. See page 348. 
Fig. 2, a, b. Lagena squamoso-marginata, Parker and Jones. Living on the Coral-reefs 
of Australia (Jukes) ; fossil in the Middle Tertiary beds of San Domingo. 
See page 356. 
Fig. 3, a, b. Lagena radiato-marginata, Parker and Jones. Bare. Recent, Australian 
Coral-reefs (Jukes) ; fossil, Middle Tertiary, Bordeaux. See page 355. 
* This Lagena, as well as the other Grignon specimens on this plate, together with Discorbina globigerinoides 
on Plate XIX., and many other Foraminifera, were obtained from the inside of a Cerithium giganteum ; and, as 
a group, they differ from those got by us from any other sample of the Calcaire grossier, in their extreme 
freshness and their minute size. The Australian seas supply a Foraminiferal fauna very analogous to that of 
Grignon (fossil) ; and that of the northern part of the Red Sea (300-600 fathoms) corresponds in many respects 
to that shown by the contents of the fossil shell referred, to. The Ceritliium itself would not, of course, indicate 
any such depth as that above mentioned ; but the analogy of the fossil and recent faunae under notice is cer- 
tainly striking. Still, the smallness of some of the forms amongst those from the Red Sea, and the absence of 
Polyzoa and of small Gasteropoda and Lamellibranchs in these soundings (replaced by abundance of small 
Pteropods), sufficiently separate the two. 
