^T. 22 SAN PEDRO FAUNA OLDROYD. J 



Genus CADULUS Philippi, 1844. 



CADULUS HEPBUKNI Dall, 1897, not rare. 



Living, Victoria, Britisli Columbia, to Monterey, California. 



Family ACTEONIDAE. 



Genus ACTEON Montfort, 1810. 



Subgenus RiCTAXis Dall, 1871. 



ACTEON PUNCTOCOELATUS Carpenter. 1864, one specimen. 



Living, Vancouver Island, British Colurabia-Magdalena Bay, Lower Cali- 

 fornia. 



Family ACTEOCINIDAE. 



Genus ACTEOCINA Gray, 1847. 



ACTEOCINA PEDROENSIS, new species, plentiful. 

 ACTEOCINA EXIMIA Baird, 1863, four specimens. 



Living, Kodiak Island, Alaska-Puget Sound. 



ACTEOCINA INFREQUENS C. B. Adams, 1852, not rare. 



Living, Santa Monica, California-Panama. 



ACTEOCINA CEREALIS Gould, 1853, not rare. 



Living, Santa Barbara-San Diego, California. 



ACTEOCINA TUMIDA T. S. Oldroyd, 1922. 



Not found living. 



Genus RETUSA Brown, 1837. 

 Section COLEOPHYSIS Fischer, 1883. 

 RETUSA HARPA Dall, 1871, not rare. 



Living, Queen Charlotte Islands. British Columbia-San Diego. California. 

 Genus VOLVULELLA Newton, 1891. 



VOLVULELLA COOPERI Dall, 1819, not rare. 



Living, Catalina Island-Scammon Lagoon, Lower California. 



Family SCAPHANDRIDAE. 

 Genus CYLICHNELLA Gabb, 1872. 



CYLICHNELLA ALBA Brown, 1827. two specimens. 



Living, Arctic Ocean-San Diego, California. 



Family AKERIDAE. 



Genus HAMINOEA Turton, 1830. 



HAMINOEA DALLI Bartsch, new species, plentiful. 



Living, Santa Barbara, California-Mexico. 



HAMINOEA VESICULA Gould, 1855. not rare. , ^ ,.^ 



Living, Vancouver Island, British Columbia-Gulf of California. 



Family SIPHONARIIDAE. 



Genus WILLIAMIA Monterosato, 1884. 



WILLIAMIA VERNALIS Dall. 1870. three specimens. 



Living, Crescent City, California-San Diego. 



