PLATE X. 



PIROLOCULINA. 



Figures 1, 2. — Spiroloculina limbata, d'Orbigny, (var.) . x 30 



Figs. 1 a, 2. Lateral aspect ; 1 b, oral aspect. 



3, 4. — Spiroloculina impressa, Terquem, 



Figs. 3 a, 4. Lateral aspect ; 4 b, oral aspect. 



,, 7-11. — Spiroloculina tenuis, Czjzek, sp., . 



Figs. 7 a-10. Lateral aspect ; 7 6, oral aspect- 

 Fig. 11. Transverse section of the test. 



,, 12-15. — Spiroloculina acutimargo, n. sp., . 



Figs. 12, 13a-15. Lateral aspect ; 1 3 b, oral aspect. 



,, 16,17. — Spi) -oloc ulina grata, Terquem, 

 Lateral aspect. 



„ 1S-20. — Spiroloculina (?) convexiuscula, n. sp., 



Figs. 18a-20. Lateral aspect ; 18 b, oral aspect. 



,, 21. — Spiroloculina antillarnm, d'Orbigny, 



a, Lateral aspect ; 6, oral aspect. 



„ 22, 23. — Spiroloculina grata, Terquem, 



Figs. 22 a, 23. Lateral aspect ; 22 b, oral aspect. 



,, 24-26. — Spiroloculina crenata, Karrer, 



Figs. 24 a-26. Lateral aspect : 24 b, oral aspect. 



Diam. Page 



150 



x 40 151 



5, 6. — Spiroloculina tenuiseptata, n. sp., . . • 153 



Fig. 5. a, Lateral aspect ; b, oral aspect, . . x 40 



Fig. 6. Specimen with the thin shelly septum partially 

 wanting, . 



x 75 



x 50 152 



50 154 



x 50 155 



x 50 155 



x 30 155 



x 30 155 



x 75 156 



