PLATE II. 



Fig. 4. 



Fig. 5. 



Fig. 1. FUSULINA GRACILIS. 



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 CYLINDRICA. 



Natural size. 



2 a. The same, enlarged. 



Fig. 3. FUSULINA ROBUSTA. 



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. • 



Productus SEMIRETICULATUS. 

 View of ventral valve, much weathered and broken. 



4 a. Side view of same. 



Ortiiis ? 



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. 



Spirifer (Martinia) lineatus ? 



Dorsal view. Natural size. 



Ventral valve of same. Profile view. 

 Another view of same. 



Cardinal view of same, showing the foramen. 

 Enlarged surface markings of same species as seen on weathered 

 specimens. 



Eetzia com press a. 

 Ventral valve. Natural size. 

 Same, enlarged. 



Front view of same specimen, enlarged. 



View of the beak (somewhat enlarged) <>f a ventral valve, as 

 seen imbedded in the matrix. 



Euomphalus (Omphalotrochus) Whitneyi. 



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

 tion of the body whorl represented without strise is 

 restored in the figure.) 



8 ". Side view, showing tbe aperture, &e. 



PAGE 



4 



Fie. 6. 



ig 



6 a. 

 6 b. 

 6 c. 

 Qd. 



Fig. 7. 



< a. 

 lb. 

 7 c. 



Fig. 8. 



11 



10 



13 



14 



K> 



