100 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ses. 



EXPLANATION OF PLATE 2 

 All figures natural size 



Fig. 1. Chione margaritana, new species. Type. Exterior of right 

 valve. Santa Margarita Formation of the Coalinga region, California. 



Fig. 2. Astrodapsis peltoides, new species. Type. Santa Margarita 

 Formation of the Coalinga region, California. 



Fig. 3a. Tellina nevadensis, new species. Type. Exterior of right valve. 

 Lower Miocene of Kern River, California. 



Fig. 3b. The same. Exterior of left valve. Lower Miocene of San Luis 

 Obispo County, California. 



Fig. 3c. The same. Interior of the left valve. Same locality as fig. 3a. 



