24 CALIFORNIA ACADEMY OF SCIENCES [Peoc. 4th Sek. 



EXPLANATION OF PLATE 2 



Fig. I. Leptochiton heathi Berry. Dorsal view of head valve of para- 

 type [124a]:xl2H. 



Fig. 2. Leptochiton heathi Berry. Dorsal view of fourth valve of 

 paratype [124a] : x 12J/2. 



Fig. 3. Leptochiton heathi Berry. Etorsal view of tail valve of 

 paratype [124a] : x 12J/2. 



Fig. 4. Leptochiton heathi Berry. Interior view of head valve of 

 paratype [124a] : x 12^. 



Fig. 5. Leptochiton heathi Berry. Interior view of fourth valve of 

 paratype [124a] : x 12j^. 



Fig. 6. Leptochiton heathi Berry. Interior view of tail valve of 

 paratype [124a] : x 12^. 



