EXPLANATION OF PLATE 16 



Fig. 1. Spisula? saxidomoides, n. sp. Type, no. 11268, Coll. Invert. Palae. 

 Univ. Calif., loc. 1131. Natural size. 



Fig. 2. Area submontereyana, n. sp. Type, no. 11186, Coll. Invert. Palae. 

 Univ. Calif., loc. 52. Natural size. 



Fig. 3. PsammoMa aff. edentula Gabb. No. 11187, Coll. Invert. Palae. Univ. 

 Calif., loc. 1311. Natural size. 



Fig. 4. Glycimeris tenuimbricata, n. sp. No. 11185, Coll. Invert. Palae. Univ. 

 Calif., loc. 1173. Natural size. 



Fig. 5. Area (Scapharca) mediaimpressa, n. sp. Type, no. 11174, Coll. Invert. 

 Palae. Univ. Calif., loc. 1131. Approximately twice natural size. 



Fig. 6. Area (Scapharca) mediaimpressa, n. sp. Hinge view of same speci- 

 men as fig. 5 ; approximately twice natural size. 



Fig. 7. Area (Scapharea) mediaimpressa, n. sp. No. 11189, Coll. Invert. 

 Palae. Univ. Calif., loc. 1131. Approximately three times natural size. 



Fig. 8. Glycimeris tenuimbricata, n. sp. Type, no. 11183, Coll. Invert. Palae. 

 Univ. Calif., loc. 1131. Hinge view of somewhat eroded specimen, natural size. 



Fig. 9. Glycimeris tenuimbricata, n. sp. External view of same specimen 

 as fig. 8, natural size. 



Fig. 10. Glycimeris tenuimbricata, n. sp. No. 11188, Coll. Invert. Palae. 

 Univ. Calif., loc. 2754. Natural size. 



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