222 ■ BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



Saxicava antarctica Philippi. 



Saxicavidae. 



Pholadidae. 



Xylophaga mexicana Dall. 

 Plioladidea (Penitella) luinuscula Dall. 



Periploma carpenteri Dall. 



Busliia pananiensis Dall. 



Lyonsia panamensis Dall. 



Verticordiu perplicata Dall. 

 Lyonsiella radiata Dall. 



Periplomatidae. 



Anatinidae. 



Lyonsiidae. 



Verticordiidae, 



Poromyacidae. 



Poromya perla Dall. 



Poromya (Dermatomya) mactroides Dall. 



Poromya (Dermatomya) equatorialis Dall. 



Poromya (Dermatomya) cliilensis Dall. 



Cetoconclia smithii Dall. 



Cetoconclia scaplia Dall. 



Cuspidariidae. 



Cuspidaria pataponica Smith. 

 CuHpiilaria panaiiifiisis Dall. 

 Cuspidaria (Cardiomya) pseustes Dall. 

 Cuspidaria (Cardiomya) planctifa Dall. 

 Cuspiclariii (Luzotiia) cliilensis Dall. 

 ^lyonera garretti Dall. 



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