ySO PliOCKEDINGS OF TEE NATIONAL MUSEUM. vol. xxi. 



Genus ERYCINA Lamarck. 



7. f JJrycina suhquadrata Gar^enter, 1857 ; Mazatlan. 



Described as a Montacnta, but, according to a camera lucida drawing of the 

 type by Carpenter, has the hinge of Erycina. 



8. Erycina {Pseudopythina) rugifera Carpenter, 1864; Puget Sound. 



Described as Pythina. Lives attached to the abdomen of Geiia pugetensia Dana, 

 a burrowing crustacean. Lepton rude Whiteaves, is synonymous. 



9. Erycina {Pseudopythina) compressa Dall, 1899; Nunivak Island, 



Bering Sea, and throughout the Aleutian region. 



Genus BORNIA Philippi. 



10. Bornia pulchra Fhili^lA, 1848; "West America." 



Described as Kellia. Probably a Pythina, but unfigured. 



11. Bornia species indet. Carpenter, Maz. Cat. No. 088, 1857; Mazatlan. 

 Listed as Laswa species, but appears from a camera lucida sketch of the type 



to have the hinge of Bornia. 



12. Bornia retifera Dall, 1899; off Santa Eosa Island, California, in ]3 



fathoms. 



Dredged by the U. S. Fish Commission. 



13. "? Bornia dubia Deshayes, 1855 ; Muerte Island, Guayaquil. 



Described as Erycina, but perhaps a Bornia. 



Genus KELLIA Turton. 



14. Kellia snborbicularis (Montagu as Mya), 1804; Straits of Juan de 



Fuca south to Mazatlan ; North Atlantic. 

 Has many synonyms: Tellimya lactea and tenuis Brown, 1827; Bornia injiata 

 Philippi, 1844, and others have been cited in connection with it. The West 

 American specimens seem identical with those of Europe. 



15. Kellia laperousH Deshayes, 1839; from Bering Island and the Aleu- 



tians south along the coast to San Diego, California, and 

 Panama. 



The largest and finest of the genus and a typical Kellia; very variable; Bornia 

 luticola Valenciennes, 1846; Chironia laperousii Deshayes; Kellia rotundata 

 Carpenter, 18(55 and Kellia var. chironii Carpenter, are synonymous. 



16. ■? KelUa papyracea Deshayes, 1855; West Colombia. 

 Described as Erycina and untigured, but perhaps a Kellia.^ 



? Genus SERRIDENS Dall. 

 Pristiphora Carpenter, 1865, not Blanchard, 1835. 



17. Serridens oblonga Carpenter, 1865; San Pedro, California. 



' Kellia ventricoaa (C. B. Adams as Amphidesma) Carpenter, 1857, is a Semele. 



