EXPLANATION OF PLATE 12 



Fauna of Martinez Eocene 



Fig. 1. Tellina lewi, n. sp. X 3. 



Fig. 2a. Psammobiaf ?) cylindrica, n. sp. X 1. 



Fig. 2b. Psammobiaf ? ) cylindrica, n. sp. X 1. 



Fig. 3. Soien stantoni Weaver, after Weaver. X 1. 



This species is abundant and rather characteristic of the uppermost 

 Martinez. 



Fig. 4a. Spisulaf?) weaveri, n. sp. Packard. X 1. 



Fig. 46. Spisulaf ? ) weaveri, n. sp. Packard. X 1. 



Fig. 5. Mactraf?) tenuissima Gabb. X 2. 



Fig. 6. Teredo, sp. XI. 



Fig. 7. Dentalium cooperi Gabb. X 1. 



This smooth, large Dentalium is found in the Chico-Cretaceous 

 Martinez, and the Tejon. 



Fig. 8. Acmaea martinesensis, n. sp. X 1. 



Fig. 9. Fissurellaf?) behri, n. sp. X 2. 



Fig. 10. Discohelix calif ornicus Weaver, after Weaver. X 1. 



Fig. 11. Nerita(?), sp. X 2. 



Fig. 12. Neritaf?) biangulata, n. sp. X 3. 



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