PLATE 24.— Foraminifera. 



Figure 



1. Orbulina universa. 



2. Globigerina bulloides. 



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



4. Spliairoidina austriaca. 



5. Spirillina perforata. 



6. Planorbulina Haidingeri, a, 6. 



7. Discorbina rosacea, a, b. 



8. Patellina corrugata. 



9. Truncatulina lobatula, a, b. 



10. Planorbulina mediterranensis. 



11. Pulvinxdina vermicular is. 



12. Planorbulina veneta (living). 



13. Rotalia Beccarii, a, b. 



14. Ditto ; sarcode, without shell. 



15. Fusidina cylindrica, a, b, c. 



16. Pulvinulina repanda, a, b,c. 



17. Cymbalopora Poyei, a, b. 



18. Nonionina crassula, a, b. 



19. Polystomella striata -punctata. 



20. Polystomella crispa, a, b. 



21. Nummidites radiata, a, b. 



22. Nummidites acuta, section. 



23. Operculina arabica, nat. size. 



24. Ditto, enlarged horizontal section of portion. 



25. Ditto, enlarged transverse section of part. ] /T , x 



' & l [ (Foraminifera). 



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



27. Calcarina Spengleri. 



28. Amphistegina Hauerina, a, b. 



