PLATE II. 



PAGE 



Fig. 1. FUSULINA GRACILIS. 4 



Natural size. 

 1 a. Same, enlarged. 

 1 b. Section of same, enlarged. 



1 c. Enlarged view, showing the undulations of the septa, as seen in 



a longitudinal section. 



Fig. 2. FUSULINA CYLINDR1CA. 4 



Natural size. 



2 a. The same, enlarged. 



Fig. 3. FUSULINA ROBUSTA. 3 



A rather small specimen. Natural size. 



3 a. Same, enlarged. 



3 b. Transverse section of same, enlarged. 



3 c. Enlarged view, showing the undulations of the septa, as seen in 



a longitudinal section. 



Fig. 4. Productus semireticulatus. 11 



View of ventral valve, much weathered and broken. 



4 a. Side view of same. 



Fig. 5. Orthis ? 10 



Ventral view. Natural size. 



5 a. Dorsal view of same, enlarged. 

 5 b. Side view of same, enlarged. 



5 c. Enlargement of a portion of the surface, showing the openings 



left by the breaking away of the minute tubular spines. 



Fig. 6. Spirifer (Martinia) lineatus ? 13 



Dorsal view. Natural size. 



6 a. Ventral valve of same. Profile view. 

 6 b. Another view of same. 



6 c. Cardinal view of same, showing the foramen. 



6 d. Enlarged surface markings of same species as seen on weathered 



specimens. 



Fig. 7. Eetzia compress a. 14 



Ventral valve. Natural size. 



7 a. Same, enlarged. 



7 b. Front view of same specimen, enlarged. 



7 c. View of the beak (somewhat enlarged) of a ventral valve, as 



seen imbedded in the matrix. 



Fig. 8. Euomphalus (Omphalotrochus) Whitneyi. 15 



View of underside, showing the umbilicus. (The por- 

 tion of the body whorl represented without strise is 

 restored in the figure.) 



8 a. Side view, showing the aperture, &e. 



