EXPLANATION OF PLATE 6 



Fig. 1. Chione lineolata, n. sp. Type, no. 11123, Coll. Invert. Palae. Univ. 

 Calif., loc. 1131. View of hinge of right valve; the posterior cardinal was broken 

 in preparation. 



Fig. 2. Chione lineolata, n. sp. External view of same specimen as fig. 1. 

 Natural size. 



Fig. 3. Chione mediostriata, n. sp. No. 11124, Coll. Invert. Palae. Univ. 

 Calif., loc. 1131. View of hinge of right valve, natural size. 



Fig. 4. Chione mediofttriata, n. sp. No. 11125, Coll. Invert. Palae. Univ. 

 Calif., loc. 1131. View of hinge of left valve, natural size. 



Fig. 5. Chione lineolata, n. sp. No. 11126, Coll. Invert. Palae. Univ. Calif., 

 loc. 1131. View of hinge of left valve, natural size. 



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