Natica B7'oderipiana, Reel., Panama, 

 aurantia^ Lam., 

 rufa. Born, Isle of France, 

 lanthina communis, Risso., 



glohosum, Sowb., Pacific Islands, 

 bifida, Nuttall, Sandwich Isl., nur 

 Cyprina islandica, Linn., Ireland, 

 Capsa Icevigata, Lam., 

 Donax anatinum, Lam., Mediterranean, 

 trunculus, Linn., " 



variabilis, Say, South Carolina, 

 scortum, Linn., Java, 

 denticulatus, Lam., West Indies, 

 Cardium apertum, Chem., Jamaica, 



subelongatum, Sowb., St. Thomas, 

 Cyclina Sinensis, Desh., China, 

 Modiola plicatula, Lam., New Jersey, 

 tulipa, " West Indies, 



Lucina Jamaicensis, Lam., Jamaica, 



Pennsylvaniea, Lam., Jamaica, 

 columbella, Liberia, 

 Machcera costata, New Jersey, 

 Astarte castanea, Say, New Jersey, 

 Chama lobata, Br., West Indies, 

 Solen vagina, Linn., England, 



ensis, " New Jersey, 

 eultellus, " England, 

 ambiguus, Lam., Gaudaloupe, 

 siliqua, Linn., England, 

 legumen, " " 



brevis, Gray, Africa, 

 acutidens, Manilla, 

 viridis. Say, South Carolina, 

 ■Solecurtus coarctatas, Grael., South Carolina, 

 Unio patelloides, Lea, Uruguay, 

 purpuratus, Lam., Tennessee, 

 multiradiatus, Lea, " 

 zig-zag, " Ohio, 



asper, " " 



<:ircidus, " " 



■sulcatus, " " 



apicidatus, Say — fine specimens, 

 spinosus, Lea, Georgia, 

 Murchisonianus, Lea, Canton, /• 

 Leai, Gray, Canton, 



