Megalomastoma tortum^ Wood, Cuba, 



auriculatum^ Orb., Cuba, 

 Cassidula nuistelina, Desh., Borneo, 

 Paludina Bengalensis, Lam., Bengal, 

 lecythoides, Benson, China, 

 Burrougldana, Lea, India, 

 carinata^ Swainson, " 

 quadrata, Benson, " 

 olivacea, Swainson, Zanzibar, 

 subpurpurea, Say, Indiana, 

 decisa, Say (reversed specimen), 

 integra, Say, Ohio River, 

 intertexta, Say, New Orleans, 

 incrassata, Lea, Alabama River, 

 subcarinata, Say, Ohio River, 

 magnifica, Conrad, Alabama Riv., 

 Uneata, Val., Ohio River, 

 achatina, Lam., Hungary, 

 poriderosa, Say, Louisville, Ky., 

 Bithinia tentaoulata, Linn., Austria, 



cerameopoma, Benson, Bengal, 

 Pomatiopsis lapidaria, Say, Pennsylvania, 

 Amnicola porata, " " 



Valvata tricarinata,, " " 



Anculosa dissimilis, " " 



Neritina Philippinarum, Sowb., Philippines, 



(vars.,) 

 Neritina vindis, Linn., West Indies^ 



punctulata, Lam., Cuba, 

 Nerita polita, Linn., Philippines (vars.), 

 peleronta, Lam., Cuba, 

 picea, Recluz., Ascension Island, 

 Chem7iitzii, Recluz., Timor, 

 Sigaretus perspectivus, Say, South Carolina, 



Gragi, Desh., Chili, 

 Natica solida, 



Jiuctiiala, Jay, Philippines, 



helvacea, Lam., India, 



vitellus, " " 



canrena, Linn., West Indies, 



uber, Val., Panama, 



lineata, Lam., 



melano stoma, Sowb., New Zealand, 



millepunctatu, Lam., 



albumen, Linn., Philippines, 



