PLATE III. 



Figs. 1 3. TROCHAMMINA GORDIALIS, Jones and Parker. (Page 77.) 



Figs. 1, 2. From Carboniferous specimens. Magnified 100 diameters. 

 Fig. 3. X 50 diam. 



Figs. 4, 5. TROCHAMMINA PUSILLA (Geinitz). (Page 78.) 



Fig. 4. From a Carboniferous specimen, x 50 diam. 



Fig. 5. From a Permian specimen, after Kirkby. X 20 diam. 



Figs. 6, 7. TROCHAMMINA ROBERTSONI, nov. (Page 80.) 

 From Carboniferous specimens. X 100 diam. 



Fig. 8. TROCHAMMINA ANOEPS, nov. (Page 76.) 



a Lateral, b periphero-lateral aspect. From a Carboniferous specimen. X 70 

 diam. 



Figs. 9, 10. TROCHAMMINA ANNULARIS, nov. (Page 76.) 

 Carboniferous specimens. X 100 diam. 



Figs. 11 15. TROCHAMMINA MILIOLOIDES, Jones, Parker, and Kirkby. (Page 79.) 



Figs. 11 13, lateral, 14, 15 periphero-lateral aspects. From Permian 

 specimens ; after Kirkby. x 20 diam. 



Fig. 16. TROCHAMMINA FILUM (Schmid). (Page 81.) 



Copied from Dr. Schmid's figure from a Zechstein (Permian) specimen. Mag- 

 nifying power not stated. 



Figs. 17, 18. VALVULINA DECURRENS, Brady. (Page 87.) 



Fig. 17. a superior lateral, b peripbero-lateral aspect. 



Fig. 18. Superior aspect of a weathered and corroded specimen; the septa 

 obliterated on the exposed surface. X 50 diam. 



Figs. 19, 20. VALVULINA RTJDIS, nov. (Page 90.) 



Fig. 19. a superior, b peripheral, c inferior aspect. X 50 diam. 

 Fig. 20. Horizontal section, showing the subdivision of the interior into small, 

 irregular, angular chamberlets. X 50 diam. 





