EXPLANATION OF PLATE 50 



All figures approximately natural size 



Fig. 1. Dosinia merriami, n. sp. var. occidentalis, n. var. A very common 

 spiecies in the Upper San Pablo. Longitude, 80 mm. 



Fig. 2. Amiantis dalli, n. sp. Left valve. Found in the Upper San Pablo. 

 Longitude, about 85 mm. 



[530] 



