NATURAL SCIENCES OF PHILADELPHIA. 423 



subrectisque ; margarita vel alba vel purpurea vel salmonis colore 

 tincta et vakle iridesceute. 



Hab. Rock}'^ Creek, near Macon, Geo., J. C. Plant; and Carter's 

 Creek, Geo., J. Postell. 



Unio hastatus. 



Testa Isevi, transversa, subconipressa, valde injequilaterali, pos- 

 tice angulata, antice rotunda; valvulis crassiusculis, antice parum 

 crassioribus ; natibus prominulis, epidermide luteo-oliva, obsolete 

 radiata; dentibus cardinalibus parvis, subcompressis crenulatis- 

 que ; lateralibus longis, lamellatis subrectisque ; margarita alba et 

 valde iridescente. 



Hah. New Market, Abbeville Dist., S. C, Dr. L. R. Gibbs and 

 Dr. Barratt; and Rocky Creek, near Macon, Geo., J. C. Plant. 



TJnio corneus. 



Testa Isevi, oblonga, subcompressa, ad latere parum planulata, 

 inaequilaterali, postice biangulari, antice rotundata ; valvulis cras- 

 siusculis; natibus prominulis; epidermide cornea, perradiata ; 

 dentibus cardinalibus crassiusculis et in utroque valvule duplici- 

 bus ; lateralibus longis, crassis subcurvisque; margarita pallido- 

 purpurea vel salmonis colore tincta et iridescente. 



Hab. Columbus, Geo., G. Hallenbeck; Abbeville Dist., S. C, 

 Dr. Barratt ; Marietta, Geo,, J. C. Anthony. 



TJnio strumosus. 



Testa laevi, rotundata, inflata,inaequilaterali, postice obtuse undu- 

 lata, antice rotundata ; valvulis crassis ; natibus prominulis ; epi- 

 dermide tenebroso-fusca vel nigra, eradiata ; dentibus cardinalibus 

 subgrandibus, rugosis, in utroque valvule duplicibus ; lateralibus 

 longis, rugosis curvatisque ; margarita alba et iridescente. 



Hab. Yadkin River, N. C. C. M. Wheatley. 



