^^r''] PROCEEDINGS OF THE NATIONAL MUSEUM. 423 



Suborder VENERACEA. 



Family VENEKIU^. 



Genus CHIONE Megerle. 

 38. Cliioae multicostata Shy. 

 James Island, Alhatross. 



39. Chione compta Urod. 

 Indefatijiable Island, Albatross. 



40. Chione undatella 81)y. 

 James Island, Alhatross. 



Subfamily Tapesin^. 

 Genus TAPES Megerle. 

 41. Tapes grata Say. 

 Indefatigable Island, Albatross. 



Suborder TELLINACEA. 



Family PETRICOLID^. 



GenuH PETRICOtiA Luuiiirck. 

 42. Petricola amygdalina Sby. 

 Galapagos Islands, Carpenter. 



Family TELLINID^. 

 Genus LUTRICOLA Blainville. 



43. Lutricola excavata Sby. 



=Z. alta Conr.ad. 

 Chatham Island, Jones; Indefatigable Island, Albatross. 

 Family SEMELID^. 



Genus SEMELE Scbuniacher. 



44. Semele rupiuni Sby. 

 Hood Island, Carpenter. 



45. Semele punctatum Sby. 

 Galapagos Islands, Carpenter. 



Suborder MACTRACEA. 



Family MACTRID^. 



Genus MACTRA Liunt^'. 

 46. Mactra velata I'bil. 



Chatham Island, Jones. 



