EXPLANATION OF PLATE 15 



Fauna of Martinez Eocene 



Fig. 1. Cypraea bayerquei Gabb. X 1. 



Range, Tejon and Martinez. 



Fig. 2. Tritonium martinezensis, n. sp. X 2. 



Fig. 3. Tritonium buwaldi, n. sp. X 1 . 



Fig. 4. Brachysphingus liratus Gabb. X 1. 



A very easily identifiable and characteristic Martinez species. 



Fig. 5. Turbinella crassatesta Gabb. X 2. 



Fig. 6. Ficopsis, sp. X 1. 



Fig. 7 a. Urosyca caudata Gabb. X 1. 



This species changes with increase in size. The nodes become 

 larger and less numerous in large specimens. 



Fig. 7b. Urosyca caudata Gabb. X 1?. 



Fig. 8. Urosyca rdbusta Weaver. X 1. 



From a locality near Selby Smelter. 



Fig. 9. Siphonaliaf ?) lineata Stanton. X 1. 



Fig. 10. Hcmifusus waringi, n. sp. X 2. 



Fig. 11. Neptunea mucronata Gabb. X 1. 



A characteristic Martinez species. 



Fig. 12. Neptunea cretacea Gabb. X 1. 



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