PLATE 24. Foraminifera. 



Figure 



1. Orbulina universa. 



2. Globigerina bulloides. 



3. Ditto, seen by transmitted light, with air in the cells. 



4. Sphceroidina austriaca. 



5. Spirillina perforata. 



6. Planorbulina Haidingeri, a, b. 



7. Discorbina rosacea, a, b. 



8. Patellina corrugata. 



9. Truncatulina lobatula, a, b. 



10. Planorbulina mediterranensis. 



11. Pulvinulina vermicularis. 



12. Planorbulina veneta (living). 



13. Rotalia Beccarii, a, b. 



14. Ditto ; sarcode, without shell. 



15. Fusulina cylindrica, a, b, c. 



16. Pulvinulina repanda, a, 6, c. 



17. Cymbalopora Poyei, a, 6. 



18. Nonionina crassula, a, 6. 



19. Polystomella striato-punctata. 



20. Polystomella crispa, a, b. 



21. Nummulites radiata, a, b. 



22. Nummulites acuta, section. 



23. Operculina arabica, nat. size. 



24. Ditto, enlarged horizontal section of portion. 



25. Ditto, enlarged transverse section of part. } 



26. Ditto, portion of fig. 25, highly magnified. J 



27. Calcarina Spengleri. 



28. Amphistegina Hauerina, a, b. 



