36 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Se«, 



EXPLANATION OF PLATE 8 



Fig. L Ischnochiton asthenes Berry. Dorsal view of paratype 

 [471a] : x 10. 



Fig. 2. Ischnochiton asthenes Berry. Left side of valves ii-vi and 

 adjacent region of girdle of paratype f471a]:x21. 



