PLATE LXXX. 



Globigerina. 



Diam. Page 



Figures 1-5. — Globigerina conglobata, Brady, . . x 50 603 



Figs. 1-3. Bottom specimens; figs. 1, 2, superior aspect, 

 showing supplementary apertures ; fig. 3, in- 

 ferior aspect. 



Fig. -t. Spinous pelagic specimen. 



Fig. 5. Section of the shell, showing its thickness, and 

 the coarse tubulation of the walls. 



,, 6-10. — Globigerina digitata, Brady, . • x 50 599 



Bottom specimens ; figs. 6, 8, superior aspect ; figs. 

 7, 9, inferior aspect; fig. 10, peripheral 

 aspect. 



„ 11-17. — Globigerina sacculifera, Brady, . . x 50 604 



Figs. 11-14. Bottom specimens; figs. 11-13, superior 



aspect ; fig. 1 4, inferior aspect. 

 Figs. 15, 16. Small pelagic specimens, in the spinous 



condition. 

 Fig. 1 7. Section of the shell, showing its thickness and 



the coarse tubulation of the walls. 



,, 18— 21.— Globigerina cequilateralis, Brady, . x 50 605 



Figs. 18, 19. Bottom specimens; a, a, lateral aspect; 



b,b, peripheral aspect. 

 Fig. 20. Surface specimen. 

 Fig. 21. Section of the shell. 



