﻿PLATE II. 



Figs. 1 — 9. Climacammina antiqua, Brady. (Page 68.) 



Figs. 1 — 5. Specimens illustrating general external characters, septation, 

 apertures, &c. Magnified 30 diameters. 



F'igs. 6, 7. Casts of terminal chambers of small cylindrical specimens with their 

 general apertures. X 30 diam. 



Fig. 8. Transparent longitudinal section, showing apertures, septa, and general 

 structure. X 30 diam. 



Fig. 9. Portion of the same section, more highly magnified, to show the 

 arenaceous structure of the test and the partial filling of the chambers with 

 cancellated labyrinthic ingrowths. X 200 diam. 



Figs. 10 — 14. Trochammina incerta (d'Orbiyny). (Page 71.) 



Figs. 10, a, b. Lateral and periphero-lateral aspects. X 60 diam. 

 Figs. 11, a, b. „ „ X 50 diam. 



Figs. 12, 13. Lateral aspect. X 50 diam. 



Fig. 14. Transparent section of test highly magnified, showing its very finely 

 sub-arenaceous structure. X 200 diam. 



Figs. 15 — 20. Trochammina centrifuga, Brady. (Page 74.) 



Figs. 15 — 18. Lateral aspect, illustrating range of variation in general external 

 features. X 70 diam. 



Fig. 19. Periphero-lateral aspect. X 70 diam. 



Fig. 20. Transparent horizontal section, showing the simple tubular character 

 of the test and the absence of any true septa. X 70 diam. 



