86 PALAEONTOLOGY OF CALIFORNIA. 



FISSURELLA, Brug. F. VOLCANO, Eve. 



Fissurella volcano, Rve. ; Icon. Conch., pi. 4, sp. 2. 

 Post-Pliocene, San Pedro. Living. 



CLYPIDELLA, Swains. C. BIMACULATA, Ball. 



Clypidella bimaculata, Dall. ; (Mss.) in Coop. ; Geog. Cat. W. C. Moll., No. 470. 

 Post-Pliocene, San Pedro. Living. 



C. CALLOMARGINATA, Cpr. 



C. callomarginata, Cpr. ; Brit. Assn. Rep., 1866. 

 Post-Pliocene, San Pedro. Living. 



DENTALIUM, Linn. D. HEXAGONUM, Sby. 



D. hexagonum, Sby. ; Thes. Conch., Vol. 3, p. 103, fig. 10. 

 Post-Pliocene, San Pedro. Living. 



ACM.2EA, Esch. A. PATINA, Esch. 



Acmcea patina, Esch; Zool. Atl., 1831, p. 19, pi. 24, fig. 7-9. 

 Post-Pliocene, Santa Barbara. Living. 



A. PERSONA, Esch. 



A. persona, Esch. ; loc. cit., p. 21, pi. 24, fig. 1, 2. 

 Post- Pliocene, San Nicholas Island. Living. 



A. SCABRA, Nutt., sp. 



Lottia scabra, Nutt. ; Jay's Cat., No. 2907. 



Patella (Lottia) scabra, Gld. ; Bost. N. H. Soc. Proc., 1846, p. 162. 



Id., Gld. ; Wilkes's Exped., p. 348, pi. 32, fig. 456. 



Acmcea scabra, Cpr. ; Proc. Zool. Soc., 1856, p. 222. 



Post-Pliocene, Santa Barbara. Living. 



A. SPECTRUM, Nutt., Sp. 



Lottia spectrum, Nutt. ; Jay's Cat., No. 2877. 

 Patella (Lottia) spectrum, Gld. ; W. C. shells, p. 10. 

 Acmcea spectrum, Cpr. ; Brit. Assn. Rep., 1866. 

 Post-Pliocene, San Pedro, San Nicholas Island. Living. 



