122 FORAMINIFERA 



EXPLANATION OF PLATE 12 



Verneuilinidae, Valvulinidae 



Fig. 



1. Verneuilina tricarinata d'Orbigny. (After type figure), a, side 



view; b, apertural view. 

 2, 3. Verneuilina propinqiia H. B. Brady. (After type figures). Fig. 



2, Front view. X 15. Fig. 3, Apertural view. X 10. 

 4, 5. Tritaxia tricarinata Reuss. (After type figures). 



6. Gavdryina rugosa d'Orbigny. (After type figure), a, side view; 



b, apertural view. 



7. Gavdryina. subrotunda Schwager. X 15. (After H. B. Brady). 



a, side view; b, apertural view. 



8. Heterostomella rugosa (d'Orbigny). (After type figure), a, side 



view; b, apertural view. 

 9-11. Tritaxllma caperata (H. B. Brady). X 10. (After type figures). 

 Fig. 10, Longitudinal section. Fig. 11, Transverse section. 

 12. Clavulina ayigularis d'Orbigny. (After type figure). 

 13, 14. Clavuliria communis d'Orbigny. (After H. B. Brady). Fig. 13, a, 

 side view; b, apertural view. X 15. Fig. 14, Longitudinal sec- 

 tion. X 20. 



15. Clavulina parisie7isis d'Orbigny. (After d'Orbigny's Model). 



16. Valvulina triangularis d'Orbigiiy. (After d'Orbigny's Model), a, 



side view; b, apertural view. 



17. Arenobulimina presli (Reuss). (After Reuss). a, side view show- 



ing aperture; b, reverse side. 

 18-20. Ataxophragmium variabile (d'Orbigny). (After type figures). Fig. 

 18, a, side showing aperture; b, reverse side. Fig. 19, Specimen 

 with aperture nearly closed at edge. Fig. 20, With aperture 

 withdrawn from edge, 



21, 22. Cribrobuliinina mixta (Parker and Jones). X 20. Fig. 21, Speci- 

 men with simple aperture. Fig. 22, Specimen with complex 

 aperture. 



23, 24. Lituonella roberti Schlumberger. X 5. (After type figures), a, 

 side view; b, front view; c, apertural view. 



25, 26. Lituonella liburnica Schubert. Fig. 25, (After type figure). X 10. 

 Fig. 26, X 8. a, side view; b, apertural view. 

 27. Coskinolina liburnica Stache. X 7. (After Schubert), a, side 

 view; b, apertural view. 



