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



EXPLANATION OF PLATE 1 

 All figures natural size 



Fig. la. Chione panzana, new species. Tj'pe. Lower Miocene of San 

 Luis Obispo Co., California. 



Fig. lb. Chione panzana, new species. Same locality as fig. la., showing 

 the hinge plate. 



Fig. 2a. Chione (Lirophora) latilaminosa, new species. Type. Exterior 

 of left valve. Lower Miocene of Kern River, California. 



Fig. 2b. The same. Dorsal view. 



Fig. 2c. The same. View of hinge plate of left valve. 



Fig. 3a. Cardium' weaveri, new species. 01igocene(?) (or Miocene) of 

 northwestern Oregon. 



Fig. 3b. The same. Type. Same locality as fig. 3a. 



