30 



pressis, erectis striatisque ; lateralibus crassis, curtis, obliquis, rectis corruga- 

 tisque ; margarita alba et iridescente. 

 Hah. — Coosa River, Alabama. E. R. Showalter, M. D. 



Umo consangcineus. — Testa laevi, valde obliqua, antice tumida et truncata 

 postice compressa et obtuse angulata ; valvulis crassis, antice paulisper cras- 

 sioribus, natibus tumidis, elevatis, incurvis terminalibusque ; epidermide luteo- 

 castanea, obsolete radiata, transverse vittata, ; dentibus cardinalibus subgrandi- 

 bus, striatis subcompressisque ; lateralibus longis, crassis, corrugatis subcurvis- 

 que ; margarita argentea et iridescente. 



Sab. — Etowah River. Rev. G. White. Oostenaula River, Georgia. Bishop 

 Elliott. And Cahawba River, Alabama. E. R. Showalter, M. D. 



Unio crebrivittatus. — Testa lajvi, valde obliqua, antice tumida et truncata, 

 postice compressa rotundaque ; valvulis crassis, antice crassioribus ; natibus 

 tumidis, elevatis, incurvatis terminalibusque; epidermide tenebroso-fusca, trans- 

 verse et crebre vittata ; dentibus cardinalibus subgrandibus, striatis corrugatis- 

 que ; lateralibus longis, crassis, corrugatis subcurvisque; margarita argentea et 

 iridescente. 



Sab. — Coosawattee River, Alabama. Bishop Elliott. 



Unio intekventus. — Testa laevi, subobliqua, subcompressa, inaequilaterali, 

 postice rotundata, antice rotunda ; valvulis crassiusculis, antice crassioribus ; 

 natibus elevatis ; epidermide luteo-cornea, superne radiate, inferne striata, ad 

 umbones micanti ; dentibus cardinalibus parvis, pyramidatis striatisque ; late- 

 ralibus subcurtis, crassis, subobliquis subcurvisque ; margarita argentea et 

 valde iridescente. 



Sab. — Cahawba River, Alabama. E. R. Showalter, M. D. 



Unio pallidofclvus. — Testa laevi, obliqua, tumida, valde inaequilaterali, 

 postice rotundata, antice rotunda ; valvulis crassis, antice crassioribus ; natibus 

 elevatis, subincurvis ; epidermide pallido-fulva, maculata, inferne striata ; den- 

 tibus cardinalibus parvis, pyramidatis striatisque ; lateralibus subcurtis, crassis, 

 subobliquis ; margarita argentea et iridescente. 



Sab. — Cahawba River, Alabama. E. R. Showalter, M. D. 



Unio porphyreus. — Testa, lsevi, elliptica, ventricosa, valde inaequilaterali, 

 postice obtuse biangulata, antice rotundata ; valvulis subcrassis, antice cras- 

 sioribus; natibus prominulis ; epidermide rufo-fuscescente, micanti, eradiata : 

 dentibus cardinalibus crassiusculis, corrugatis, crenulatis, in utroque valvulo 

 duplicibus ; lateralibus longis, subcrassis, corrugatis subrectisque : margarita 

 saturate-purpurea et valde iridescente. 



Sab. — Coosa River, Alabama, E. R. Showalter, M. D. 



