86 PROCEEDINGS- OP THE ACADEMY OP 



obtuse conicis crenulatisque ; lateralibus crassis, curtis rectisque ; margaritd 

 alba et iridescente. 



Hab. Catawba River, Gaston Co., N. C. C. M. Wheatley and F. A. Genth, 

 M. D. Deep River Gulf, N. C. Prof. Emmons. 



Unio Emmonsii. Tests, Isevi, transversa subcompressa, valde ina3quilaterali, 

 postice subbiangulata, ad latere planulata ; valvulis subcrassis ; natibus vix 

 prominulis, ad apices undulatis, epidermide tenebroso-fusca, radiata, nitida ; 

 dentibus cardinalibus subgrandibus, compressis, crenulatis, in utroque valvule 

 duplicibus ; lateralibus prselongis, lamellatis rectisque ; margarita albS, et iri- 

 descente. 



Hab. Roanoke River, at Weldon, N. C. Prof. E. Emmons. 



Unio spadiceus. Testa Isevi, elliptic^,, subcompressa, inaequilaterali, postice 

 subbiangulata subemarginat4 ; Valvulis subtenuibus, antice crassioribus ; nati- 

 bus vix prominulis ; epidermide spadicea, eradiata ; dentibus cardinalibus parvis 

 crenulatisque ; lateralibus sublongis subrectisque ; margarita salmonis colore 

 tinct^ et iridescente. 



Hab. Deep River, Gulf, N. C. Prof. Emmons : and mountain streams, N. C. 

 Joseph Clark. 



Unio insulsus. Testa laevi, quadrata, inflata, insequilaterali, postice obtuse 

 angulata, at latere subplanulata ; valvulis subcrassis ; natibus prominulis, ad 

 apices rugoso-undulatis ; epidermide virido-fusca, insulse, striata, obsolete ra- 

 diata; dentibus cardinalibus parviusculis, subcompressis, in utroque vavulo 

 duplicibus ; lateralibus sublongis subcurvisque ; margarita vel alba vel pur- 

 purea et iridescente. 



Hab. Roanoke River, Weldon, N. C. Prof. Emmons. 



Unio striatulus. Testa laevi, triangulari, subinflata, subaequilaterali, postice 

 angulata ; valvulis subcrassis, antice crassioribus ; natibus elevatis, accuminatis, 

 ad apices rugoso-undulatis ; epidermide fuscA, minute striata, obsolete radiata ; 

 dentibus cardinalibus parvulis, subcompressis in utroque valvule duplicibus 

 crenulatisque; lateralibus brevibus, subcrassis rectisque; margarita vel albfi, 

 vel crocea et iridescente. 



Hab. Roanoke River, at Weldon N. C. Prof. Emmons. 



Unio macer. TestS, alatfi., laevi, obovatS,, compressissim^, valde inaequilaterali, 

 postice biangulata ; vulvulis tenuibus ; natibus parvis, acuminatis, ad apices 

 undulatis ; epidermide fuscfi., nitidd, valde radiate ; dentibus cardinalibus parvis, 

 tuberculatis ; lateralibus praelongis, attenuatis, lamellatis subrectisque ; mar- 

 garita purpurea, et iridescente. 



Hab. Roanoke River, Weldon, N. C. Prof. Emmons. 



Unio contractus. Testa laevi, elliptica, valde compresssi, valde inaequilaterali; 

 postice rubrotundata ; valvulis tenuibus ; natibus depressis, ad apices undulatis 5 

 epidermide tenebroso-fusca, obsolete radiata ; dentibus cardinalibus parvis, 

 tuberculatis ; lateralibus longis, lamellatis rectisque ; margarita vel alba vel 

 purpurea et iridescente. 



Hab. Roanoke River, Weldon, N. C. Prof. Emmons. 



Anodonta virgulata. Testa laevi, elliptica, ventricosa, inaequilaterali, postice 

 obtuse angulata; valvulis subtenuibus ; natibus prominulis, ad apices undulatis ; 

 epidermide vittata, virido-radiata ; margarita cceruleo-alba et iridescente. 



Hab. Roanoke River, Weldon, N. C. Prof. Emmons : and Washington Co., 

 Georgia. Rev. G. White. 



[Mareli, 



