68 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Explanation, Plate V 



Fig. 1. Epiphragnwphora petricola Berry, type. Portion of upper sur- 

 face of last whorl about a quarter of a turn behind the aperture, showing 

 periostracal sculpturing magnified about 15 diameters. 



Fig. 2. Epiphragviophora petricola Berry, type. Portion of basal sur- 

 face of last whorl about a quarter of a turn behind the aperture, magnified 

 about 15 diameters. 



