16 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.65 



Family CERITHIIDAE. 



Genus ALABINA Dall, 1902. 



ALABINA CALIFORNICA Dall and Bartsch, 1901; seven specimens. 

 Not known living. 



Genus BITTIUM Gray, 1847. 



Subgenus Semibittium Cossmann, 1896. 



BITTIUM ATTENUATUM Carpenter, 1864; numerous. 



Living, Forrester Island, Alaska-San Diego, California. 



BITTIUM RUGATUM Carpenter, 1866; plentiful. 



Living, San Pedro and Catalina Islands, California. 

 Subgenus Lirobittium Bartsch, 1911. 



BITTIUM CATALINENSE Bartsch, 1907; two specimens. 



Living at Catalina Island and San Diego. 



BITTIUM ORNATISSIMUM Bartsch, 1911; very plentiful. 



Living at San Pedro. 



BITTIUM ASPERUM Gabb, 1861; one specimen. 



Living, Santa Barbara to San Diego, California. 

 Family CAECIDAE. 

 Genus CAECUM Fleming, 1817. 



CAECUM CALIFORNICUM Dall, 1885; one specimen. 



Living, Monterey, California-Lower California. 



Genus MICRANELLUM Bartsch, 1920. 



MICRANELLUM CREBRICINCTUM Carpenter, 1864; plentiful. 



Living, Monterey, California-Todos Santos Bay, Lower California. 

 Genus FARTULUM Carpenter, 1858. 



FARTULUM HEMPHILLI Bartsch. 1920; not rare. 



Living, San Pedro, California-Point Abreojos, Lower California. 

 Family VERMETIDAE. 

 Genus ALETES Carpenter, 1857. 



ALETES SQUAMIGERUS Carpenter, 1856; very plentiful. 



Living, Monterey, California-Payta, Peru, and the Galapagos Islands. 



ALETES SQUAMIGERUS PENNATUS Morch, 1862; plentiful. 

 Living, San Pedro, California, and north. 



Family TURRITELLIDAE. 

 Genus TURRITELLA Lamarck, 1799. 



TURRITELLA COOPERI Carpenter. 1866; twenty specimens. 



Living, Monterey-San' Diego, California. 



