1913] 



Dickerson : 



Fauna of Eocene at Marysville Buttes 



291 



TROCTTOCYATnUS(?) PERRINT, n.sp. 

 Plate 14, figures 6a, 66, and 6c 



Form short, trochiform. Cross-section, elliptical. Base at- 

 tached by a small short pedicel which is now broken from the 

 type. Costae distinct, granular or even nodose, and correspond- 

 ing to all cycles of septa. Septa in four cycles. Pali appeared 

 to be present, but not clearly shown. Columella, fasicular (?) 

 indistinct. Calice, shallow. 



Only one specimen was found at University of California 

 Locality 1853. 



Named in honor of Professor James Perrin Smith of Stan- 

 ford University. 



Dimensions: Height, 6mm; width, 6mm. 



