496 



CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Plate II. 



Fig. 1. Tonicella lineata (Wood). Exterior view of median valve from 

 near lighthouse. Point Fermin, California (Lower San Pedro Pleistocene) 

 [1096]. 



Fig. 2. Tonicella lineata (Wood). Interior view of same valve; same 

 scale as preceding. 



Fig. 3. Tonicella lineata (Wood). Anterior elevation of same valve; 

 camera outline. 



Fig. 4. Tonicella lineata (Wood). Exterior view of tail valve from 

 near lighthouse, Point Fermin, California (Lower San Pedro Pleistocene) 

 [1097] ; same scale as Fig. 1. 



Fig. 5. Tonicella lineata (Wood). Profile of same valve; camera out- 

 line. 



Fig. 6. Cyanoplax hartwegii (Carpenter). Exterior view of median 

 valve from Chiton Bed, Point Fermin, California (Lower San Pedro 

 Pleistocene) [943] ; same scale as Fig. 1. 



Fig. 7. Cyanoplax hartwegii (Carpenter). Interior view of same valve; 

 camera outline. 



Fig. 8. Cyanoplax hartwegii (Carpenter). Anterior elevation of same 

 valve ; camera outline. 



Fig. 9. Cyanoplax fackenthallce Berry. Oblique anterior view of head 

 valve from Chiton Bed, Point Fermin, California (Lower San Pedro 

 Pleistocene) [1082]. 



Fig. 10. Cyanoplax fackenthallce Berry. Profile of same valve; camera 

 outline. 



