NATURAL SCIENCES OF PHILADELPHIA. 41 



bus ; natibus elevatis ; epidermide tenebroso-oliva, eradiata, maculata, vittata,, 

 ad umbones micanti, inferne striata ; dentibus cardinalibus parviusculis, coui- 

 presso-pyrauiidatis striatisque ; lateralibus, subbrevibus, obliquis subrectisque : 

 margarita alba et iridescente. t 



Hab.-, Cahawba River, Perry Co., Alabama. E. R. Showalter, M. D. 



TJnio asperatus. Testa, valde tuberculata, subrotunda, inflata, antice et 

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

 valde prominentibus ; epidermide rufo-lutea, eradiata; dentibus cardinalibus 

 percrassis, obtuso-conicis, corrugatis ; lateralibus brevissimis, valde obliquis 

 rectisque; margarita argentea et iridescente. 



Hab. Alabama River, Claiborne, Alabama. Judge Tait. 



Unio ornatus. Testa, lasvi, subrotunda, compressa, inaequilaterali, postice 

 subrotunda, antice rotunda ; valvulis crassiusculis, antice crassioribus ; nati- 

 bus subprominentibus, ad apices rugoso-uudulatis; epidermide mellea, viridi 

 maculata, superne nitida, inferne striata; dentibus cardinalibus parviusculis, 

 sulcatis ; lateralibus brevibus, obliquis rectisque; margarita argentea et valde 

 iridescente. 



Hab. Alabama? T. R. Ingalls, M. D. 



Unio perpurpureus, Testa, laevi, elliptica,, subinflata,, inaequilaterali, postice 

 et antice rotundata; valvulis subcrassis, antice crassioribus; natibus promi- 

 nulis ; epidermide tenebroso-viridi, nigricente, radiis capillaris ; dentibus 

 cardinalibus parviusculis, erectis, conicis,in utroque valvulo duplicibus, striatis; 

 lateralibus longis rectisque ; margarita, valde purpurea et iridescente. 



Hab. Tennessee.- J. G. Anthony. 



Unio Anthonyi. Testa, laevi. elliptica, inflata,, ad latere planiuscula, postice 

 obtuse biangulata, postice rotundata, inajquilaterali ; valvulis subtenuibus, 

 antice paulisper crassioribus; natibus prominulis ; epidermide luteo-oliva, 

 eradiata; dentibus cardinalibus parvis, obliquis, subcompressis crenulatisque ; 

 lateralibus longis, lamellatis subcurvisque ; margarita casruleo-alba, et irides- 

 cente. 



Hab. Florida. J. G. Anthony. 



Margaritana quadrata. Testa, laevi, oblongu, subcompressa, ad latere 

 planulata, subaequilaterali, postice obtuse angulata, antice rotunda ; valvulis 

 subtenuibus, antice paillisper crassioribus ; natibus prominulis, ad apices un- 

 dulatis; epidermide luteola, viridi-radiata, ; dentibus cardinalibus subgrandi- 

 bus, obliquis, compressis, triangularis, erectis subcurvisque; margarita alba, 

 superne salmonis colore tincta,, et valde iridescente. 



Hab. East Tennessee, President Estabrook. 



Margaritana Alabamensis. Testa lajvi, oblonga, inflata, ad latere paulisper 

 planulata, inaequilaterali, postice obtuse biangulata, antice oblique rotundata ; 

 valvulis subcrassis, antice paulisper crassioribus ; natibus prominulis, ad apices 

 rugoso undulatis; epidermide luteo-oliva, polita, eradiata; dentibus cardinali- 

 bus parvis, suberectis ; margarita alba et salmonia et iridescente. 



Hab. Talladega Creek, Alabama. W. Spillman, M. D. 



Descriptions of New Recent Shells from the Coast of South Carolina. 

 BY EDMUND RAVENEL, M. D. 



COLUMBELLA SIMILIS. 



This has generally been considered the young or immature shell of " C. 

 avara." The avara is a larger shell, and his fewer and much larger ribs at the 

 upper portion of the body whorl. It has about 11 ribs; whereas this shell has 

 often as many as 20 ribs, but the number varies. The avara never has all of the 

 1861.] 



