NATURAL SCIENCES OF PHILADELPHIA. 307 



cpiderrnide luteo-oliva, micante, ad margine striata, eradiata : margarita, cas- 

 ruleo-alba, et valde iridescente. 



Hab. Ckiloweyuch Depot, near Puget's Sound, Washington Territory, 

 C. B. Kennedy, M. D. 



Descriptions of Six New Species of TTNIONIDJE from Alabama. 



BY ISAAC LEA. 



Unio Showalterii. Testa lasvi, subrotunda, crassa, sublenticular!, aequila- 

 terali; valvulis crassis, antice crassioribus ; natibus elevatis, tumidis ; epider- 

 niide tenebroso-fusca, eradiata; dentibus cardinalibns crassis, erectis, compres- 

 sis, in utroque valvulo duplicibus ; lateralibus brevibus, percrassis corruga- 

 tisque ; margarita argentea et valde iridescente. 



Hab. Coosa River, Waturnpka, Alab., E. R. Showalter, M. D. 



Unio Hartmanianus. Testa, lasvi, oblique triangulari, crassa, tumida, postice 

 subbiangulari, inaequilaterali ; valvulis percrassis, antice crassioribus ; natibus 

 valde elevatis, crassis ; epidermide tenebroso-fusca, postice luteola, eradiata ; 

 dentibus cardinalibus subgrandibus, erectis, compressis, corrugatis, in utroque 

 valvulo duplicibus ; lateralibus brevibus, percrassis, obliquis corrugatisque ; 

 margarita argentea et iridescente. 



Hab. Coosa River, Waturnpka, Alab., E. R. Showalter, M. D. 



Unio dolosus. Testa Isevi, obovata., subalata, subcompressa, ad latere pla- 

 nulata, postice et antice rotundata, valde inasquilaterali ; valvulis subtenuibus ; 

 natibus prominulis, ad apices minuie undulatis ; epidermide virido-oliva et 

 obsolete radiata ; dentibus cardinalibus parvis, compressis crenulatisque ; 

 lateralibus longis, lamellatis subcurvisque ; margarita albida et purpurea, pau- 

 lisper tincta. et valde iridescente. 



Hab. Alabama River, Claiborne, Alab., Judge Tait. Coosa River, E. R. 

 Showalter, M. D. 



Unio parvulds. Testa, plicata, transversa, subinflata, ad latere compressa, 

 postice obtuse angulata, valde inasquilaterali ; valvulis tenuibus, antice pau- 

 lisper crassioribus ; natibus prominulis ; epidermide olivacea, subvirido-macu- 

 lata, ; dentibus cardinalibus parvis, compressis, crenulatis, in utroque valvulo 

 duplicibus ; lateralibus longis subrectisque ; margarita cserulea. et iridescente. 



Hab. Coosa River, Alab., E. R. Showalter, M. D. 



Unio plancus. Testa lasvi, obliquo-ovata, subcompressa, postice biangulata, 

 antice rotundata, valde inaequilaterali ; valvulis crassiusculis, antice paulisper 

 crassioribus; natibus prominulis; epidermide luteo-fusca, radiata; dentibus 

 cardinalibus parvis, erectis, crenulatis, in utroque valvulo duplicibus ; laterali- 

 bus sublongis subrectisque ; margarita caeruleo-alba. et valde iridescente. 



Hab. Coosa River, at Waturnpka, Alab., E. R. Showalter, M. D. 



Anodonta Showalterii. Testa, lasvi, elliptica, ventricosa, postice obtuse 

 angulata, antice rotundata, subsequilaterali ; valvulis crassiusculis, antice pau- 

 lisper crassioribus ; natibus subprominentibus, ad apices minute undulatis ; 

 epidermide tenebroso-fusca, obsolete radiata ; margarita vel albii vel paulisper 

 salmonis colore tincta et iridescente. 



Hab. Coosa River, Waturnpka, Alab., E. R. Showalter, M. D. 



Descriptions of Three New Species of Exotic UNI0NID2E. 



BY ISAAC LEA. 



Unio occatus. Testa plicata, elliptica, rugoso-occata, compressa, valde ina?- 

 quilaterali, postice biangulata, antice, regulariter rotundata; natibus prominu- 

 lis, valde compressis, ad apices plicis, pulchris divaricatis ; epidermide luteo- 



I860.] 



