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SUBKINGDOM MOLLUSCA. 

 Class LAMELLIBRAKCHIATA. 



Ostreidae. 



770. Ostrea vicksburgensis, Conrad. 



Pectiuidse. 



771. Radula staminea, Conrad. 



IVuculidae. 



772. Nucula serica, Conrad. 



773. Nucula vicksburgensis, Conrad. 

 114. Nuculana mucronata, Conrad. 



775. Nuculana parilis, Conrad. 



Arcidae. 



776. Area mississippiensis, Conrad. 



777. Area protracta, Conrad. 



778. CucuUarca mississippiensis, Conrad. 



779. Axincea arctata, Conrad. 



780. Axinaea mississippiensis, Conrad. 



ATiculidae. 



781. Avicula argentea, Conrad. 



Mytilidae. 



782. Perna mississippiensis, Conrad. 



Crassatellidae. 



783. Crassatella mississippiensis, Conrad. 



Ungulinidae. 



784. Scintilla oblonga, Conrad. 



Lucinidae. 



785. Lucina perlevis, Conrad. 



786. Mysia eburnea, Conrad. 

 ISl. Sphaerella turgida, Conrad. 



Cliamidae. 



788. Chama mississippiensis, Conrad. 



Cardiidae. 



789. Cardium (Trachycardium) globosum, Conrad. 



790. Cardium (Cerastoderma) eversum, Conrad. 



791. Cardium (Cerastoderma) vicksburgense, Conrad. 



792. Protocardia diversa, Conral. 



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