PLATE XXIV. 



Hyperammina. — Marsipella. 



Diam. Page 



Figures 1-9. — Hyperammina vagans, Brady, . . . x 15 260 



Figs. 1, 2. Specimens adherent to fragments of shell. 

 Figs. 3-5. Primordial chambers of specimens found 



in Globigerina ooze. 

 Figs. 6-9. Masses formed of the tubes irregularly 



crowded together. 



.. 10-19. — Marsipella elongata, Norman, .... 264 



Figs. 1 0-1 7. Specimens illustrating the range of form, 

 and the variable proportion of sand and sponge- 

 spicules employed in building the test, . x l- r > 



Figs. 18, 19. Portions of the surface more highly 



magnified, . . . x 60 



,, 20-22. — Marsipella cylindrica, Brady, . . . x 15 265 



