518 



AUTHENTIC HISTORY 



XOLATKIMA. 



*paliata Say. 

 Triodopsis. 



tridenta Say. 



fallax Say. 

 Stenotrima. 



monodon Rao. 



hirsuta Say. 



Fam. Pupad^e. 



ZUA. 



subcylindrica CJiK 

 Leucochila. 



marginata Say. 



contracta Say. 



armifera Say. 

 Isthmia. 



ovata Say. 



Fam. Auriculid.e. 



Carychitjm. 

 exiguum Say. 



Fam. Limn.'Eid^. 



LiMNOPHTSA. 



*palustris Mul. 

 *elodes Say. 

 desidiosa Say. 

 *cuperata Say. 

 humilis Say. 

 modecella Say.^ Var. 

 Physa. 



ancellaria Say. 

 heterastrojDlia Say. 



Fam. Planorbix^e. 



Planorbis. 



leutvis Say. 

 Helisoma. 



trivolois Say. 



bicarinatus Say. 

 Gyranlus. 



deflectus Say. 



parviis Say. 



Fam. Ancylix.e. 



Ancylus. 



rivularis Say. 

 tardus Say. 



Fam. Valvatid^. 

 Valvata. 

 tricarinata Say. 



Fam, Viviparid^e. 



Melaktho 



decisa Say. 

 Lioplex. 



Hubcarinata Say. 



Fam. Eassoidj<;. 



Gillia. 



altilis Lea. 

 Amnicola. 



sayana A7it. 



limosa Say. 



*decisa Hid. 



graniTin Say. 

 Pomatiopsis. 



*la,stnca Say. 



Fam. Melaniid^. 



GONIOBASIS. 



virginica Say, 

 multilineata Say., Var. 

 Leptoxis. 

 dissimilis Say. 



(BIVALVES.) 



Fam. Unionid^. 



Anodokta. 



tiaviatilis Lea. 



undulata Say. 



edeutula Lea. 

 Strophitus. 



undulatus Say. 

 Alasmodonta. 



marginata Say. 

 Ellipsis. 



viridis Baf. 



tapanianus Lea. 

 Lampsilis. 



cariosus Say. 



radiatus Lam. 

 Unio. 



complanatus Sol. 



Fam. Corbiculad.e. 



Sphaerium. 

 siilcantum Lam. 

 striatinum Loyjn. 

 fabalis Brvi. 

 trausversuni Say. 



PiSIDIUM. 



comi^ressum Prm. 

 variabile Prm. 



Note.— The species marked with a * are given on the authority of Prof. Haiaeraan, but all the 

 others have been obtained from this county by Mr. H. G. Bruckhart, of Silver Springs, and are now 

 in his collection. S. S. Rathvon. 



