EXPLANATION OF PLATE 27 



Fig. 1. Exogyra inornata, n. sp. X 1. Type no. 12284, loc. 2143. 



Fig. 2. Limopsis silveradoensis, n. sp. X 1%. Ootype no. 12323, loc. 2143. 



Fig. 3. Spondylus rugosus, n. sp. X 1. Exterior of left valve of eotype no 

 12322, loc. 2149. 



Fig. 4. Limopsis silveradoensis, n. sp. X 1%. Type no. 12324, loc. 2143. 



Fig. 5. Exogyra californica, n. sp. X 1. Type no. 12320, loc. 2143. 



Fig. 6. Pecten ?, sp. X 1%. Specimen no. 12321, loc. 2138. 



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