28 RECENT BIVALVE MOLLUSKS 



Subgenus Parvilucina Dall, 1901. 



Parvilucina tenuisculpta Carpenter, 1865. 



Nunivak Island, Bering- Sea, to the Coronado Islands, 



Lower Cal. 

 Parvilucina approximata Dall, 1901. 



Monterey, Cal., to Panama. 



Genus Divaricella Martens, 1880. 



Divaricella perparvula Dall, 1901. 



"Monterey"' (Gabb). Cape St. Lucas to Ecuador. 



Superfaniily Leptonacea 



Family Leptonid?s 



Genus Erycina Lamarck, 1806. 



Erycina catalina Dall, 1916. 



Catalina Island, Cal. 

 Erycina coronata Dall, 1916. 



Off Coronado Islands, Lower Cal. 

 Erycina bakeri Dall, 1916. 



Off South Coronado Island, Lower Cal. 

 Erycina balliana Dall, 1916. 



Off South Coronado Island, Lower Cal. 

 Erycina chacei Dall, 1916. 



Santa Rosa Island to Coronado Islands. 

 Erycina santarosae Dall, 1916. 



Santa Rosa Island, Cal. 



Genus Kellia Turton, 1822. 



Kellia laperousei Deshayes, 1839. 



Bering and Pribiloff Islands. Bering- Sea, and south to 



San Diego, Cal. 

 Kellia suborbicularis Montagu, 1804. 



Bering Island, the Aleutians, and south to Panama, x^lso 



Atlantic. 



Genus Aligena H. C. Lea, 1845. 



Aligena cerittensis Arnold, 1903. 



Pleistocene, San Pedro, Cal. Recent ? 



Genus Rochefortia Velain, 1846. 



Rochefortia tumida Carpenter, 1864. 



Shumagin Islands, Alaska, to San Diego, Cal. 

 Rochefortia planata Dall, 1899. 



Icy Cape, Arctic Ocean, south to the Shumagin Islands, 



Alaska. 



