EXPLANATION OF PLATE 12 

 Eocene of Marysville Buttes 



Fig. 



1. 



Siphonalia sutterensis, n.sp. X2. 



Fig. 



2a. 



Cancel laria stantoni, n.sp. back view. X3. 



Fig. 



2b. 



Cancellaria stantoni, n.sp. mouth view of smaller specimen. X 4. 



Fig. 



3. 



Cordiera gracillima Cooper. X5. 



Fig. 



4. 



Astyris, sp. X4. 



Fig. 



5a. 



Voluta lawsoni, n.sp., mouth view. X2. 



Fig. 



5b. 



Voluta lawsoni, n.sp., back view. X2. 



Fig. 



5c. 



Voluta lawsoni, n.sp., top view. X2. 



Fig. 



6a. 



Surcula davisiana (Cooper) type specimen. X2. 



Fig. 



6b. 



Surcula davisiana (Cooper) smaller specimen showing body 

 whorl. X4. 



Fig. 



6c. 



Detail of body whorl of Fig. 6b. 



Fig. 



7. 



Clavella tabulata, n.sp. X%. 



Fig. 



8. 



Cancellaria irelaniana Cooper, type specimen, natural size. 



[294] 



