^„^ 22 SAN PEDRO FAUNA — OLDROYD. 17 



Family LITTORINIDAE. 



Genus LITTORINA Ferussac, 1822. 

 Section LITTORIVAGA Ball, 1918. 

 LITTORINA PLAN AXIS PhiHppi, 1847; twenty specimens. 



Living, Puget Souiid-Magdalena Bay, and Socorro Islands. 

 Subgenus Melarhaphe (Muhlfeldt) Menke, 1828. 



LITTORINA SCUTULATA Gould. 1849; not rare. 



Living, Kodiak Island, Alaska-Turtle Bay, Lower California. 



Family LACUNIDAE. 

 Genus LACUNA Turton, 1827. 



LACUNA SOLIDULA Loven, 1846; two specimens. 



Living, Puget Sound-San Diego, California. Also Atlantic. 



LACUNA UNIFA3CIATA AURANTIACA Carpenter. 1856; not rare. 



Living, Santa Barbara, California-Point Abreojos, Lower California. 



Family FOSSARIDAE. 



Genus ISELICA Dall, 1918. 



ISEUCA FENESTRATA Carpenter, 1864 ; very plentiful. 



Living, Puget Sound-Gulf of California. 



Family ?- 



Genus DIALA A. Adams, 1861. 



DIALA ACUTA Carpenter. 1864; not rare. 



Living, Puget Sound-San Diego, California. 



Family RISSOIDAE. 

 Genus ALVANIA (Leach) Risso, 1826. 



ALVANIA MONTEREYENSIS Bartsch. 1911; about fifty specimens. 



Living, Sitka, Alaska-Monterey, California. 



ALVANIA AEQUISCULPTA Keep, 1887; one specimen. 



Living, Catalina Island-Todos Santos Bay, Lower California. 

 Genus PALUDESTRINA Orbigny. 



PALUDESTRINA CURTA Arnold, 1903; not rare. 



Not reported living. 

 PALUDESTRINA cf. STOKESI Arnold. 1903; eight specimens. 



Not reported living. Specimens too worn for identification. 



Family RISSOINIDAE. 



Genus RISSOINA Orbigny, 1840. 



RISSOINA KELSEYI Dall and Bartsch, 1902; two specimens. 



Living, San Pedro, California-Coronado Islands. 



