262 [November, 



Description of eleven New Species of Exotic Uniones, from Georgia. 



By Isaac Lea. 



Ukio Elliottii. Testa grande plicata, subquadrata, inflata, valde in^^quilate- 

 rali ; valvulis percrassis ; natibus prominentibus, tumidis ; epidermide nigra, 

 nitida; dentibus cardinalibus permagnis, duplicis ; lateralibus crassis, longiS; 

 lamellatis subcurvisque ; margarita argentea et iridescente. 



Hab. Othcalooga Creek, Gordon Co., Georgia. Bishop Elliott. 



Unio gracilior. Testa Isevi, elliptica, inflata, injequilaterali ; valvulis tenui- 

 bus ; natibus prominulis ; epidermide tenebroso-fusca, obsolete radiata et nitida ; 

 dentibus cardinalibus compressis erectisque ; lateralibus lamellatis, longis sub- 

 curvisque ; margarita albida et valde iridescente. 



Eab. Buckhead Creek, Burke Co., Georgia. Bishop Elliott. 



Unio pullatis. Testa loevi, transversa, inflata, valde infequilaterali ; valvulis 

 crassis ; natibus prominulis ; epidermide tenebroso-nigrd ; dentibus cardinalibus 

 Curtis, crassis, duplicis ; lateralibus crassis, longis subrectisque ; margarita vel 

 purpurea vel salmonis colore tincta et iridescente. 



Hab. Creeks near Columbus, Georgia. Bishop Elliott. 



Unio favosus. Testa Ifevi, subtriangulari, subcompressa, inffiquilaterali ; pos- 

 tice subangulata; valvulis subcrassis ; natibus prominulis, ad apices undulatis; 

 epidermide luteo-olivacea, virido-maculata; dentibus cardinalibus magnis, erec- 

 tisque ; lateralibus crassis, sublongis subrectisque ; margarita argentea et valde 

 iridescente. 



Hab. Othcalooga Creek, Gordon Co., Geo. Bishop Elliott. 



Unio rutilans. Testa Irevi, elliptica, inflata, valde inEequilaterali, in medio 

 ad basim paulisper compressa ; valvulis tenuibus ; natibus prominulis ; epider- 

 mide luteo-viridi et valde radiata; dentibus cardinalibus parvis, compressis, 

 duplicis ; lateralibus prselongis, lamellatis subcurvisque ; margarita cferuleo- 

 alba et valde iridescente. 



Hab. Othcalooga Creek, Gordon Co., Georgia. Bishop Elliott. 



Unio errans. Testa Itevi, oblonga, compressd ; valde insequilaterali ; valvulis 

 subcrassis ; natibus prominulis ; epidermide tenebroso-fusca, obsolete radiata ; 

 dentibus cardinalibus parvis, compressis ; lateralibus prfelongis, lamellatis sub- 

 rectisque ; margarita vel purpurea vel salmonis colore tincta et iridescente. 



Hab. Tobesaufkie Creek, near Macon, Georgia. Bishop Elliott. 



Unio vicinus. Testa laevi, oblonga, compressa, inasquilaterali ; valvulis sub- 

 crassis ; natibus prominulis ; epidermide virido-fusca, obsolete radiata ; dentibus 

 cardinalibus parvis, acuminatis compressisque ; lateralibus longis subcurvisque; 

 margarita argentea et valde_ iridescente. 



Hab. Swift Creek, near Macon, Gecrgia. Bishop Elliott. 



Unio subellipsis. Testa laevi, elliptica, inflata, inaequilaterali, ad basim ro- 

 .tunda ; valvulis crassis; natibus subprominentibus ; epiderme tenebroso-brun- 

 nea, polita, radiata ; dentibus cardinalibus brevibus, tumidis, subelevatisque ; 

 lateralibus praelongis subrectisque ; margarita argentea et iridescente. 



Hab. Creeks near Columbus, Georgia. Bishop Elliott. 



Unio geminus. Testa lajvi, elliptica, inflata, inaequilaterali ; valvulis crassis ; 

 natibus prominulis ; epidermide tenebroso-castanea, obsolete radiata, ad um- 

 bones polita; dentibus cardinalibus magnis, acuminatis, duplicis ; lateralibus 

 longis, crassis subcurvisque ; margarita purpurea et iridescente. 



Hab. Buckhead Creek, Burke Co., Georgia. Bishop Elliott. 



Unio rostr/Efokmis. Testa laevi, valde transversa, compress3i, at latere planu- 

 lata, valde inEquilaterali, postice acute acuminata ; valvulis tenuibus ; natibus 

 vix prominulis, ad apices undulatis ; epidermide tenebroso-fusca, obsolete ra- 



