PLATE XXIII. 



Hypekammina. 



Diam. Page 



Figures 1-3, 5, o. — H yperammina friabilis, n. sp., . . . 258 



Figs. 1, 2. Large specimens with the oral end im- 

 perfect; fig. 3, smaller specimen complete, x 10 

 Fig. 5. Portion of the ahoral end laid open, showing 

 the primordial chamber and the thickness and 

 texture of the walls, . x 20 

 Fig. 6. A similar specimen, . . x 10 



,, 4,7-10. — Hyperammina elongata, Brady, . . x 10 257 



Fig. 10. Specimen laid open to show the tubular 

 cavity. 



,, 11-14. — Hypera/mmina subnodosa, n. sp., . . x 10 259 



Fig. 11. Lateral aspect ; rig. 12, oral end. 

 Fig. 13. Transverse section of the test. 

 Fig. 14. Test laid open longitudinally. 



,. 15-19. — Hyperammina ramosa, Brady, . • x 16 261 



