EXPLANATION OF PLATE 2 



Fig. 1. Pecten ricci, n. sp. X 1. Left valve. Type. — No. 12364, Univ. 

 Calif. Mus. Pal., loc. 3535. Briones. 



Fig. 2. Pecten ricci, n. sp. X 1. Eight valve. Cotype. — No. 12365, Univ. 

 Calif. Mus. Pal., loc. 3534. Briones. 



[162] 



