192 PROCEEDINGS OP THE ACADEMY OP 



postice subbiangulata, antice rotundata ; valvnlis subtenuibus, antice parum 

 crassioribus ; natibus prominulis ; epiderraide luteo-fusca., valde radiata ; denti- 

 bus cardinalibus parvis, striatis, crenulatis ; lateralibus longis, lamellatis 

 subrectisque ; margarita, albida vel purpurea et valde iridescente. 

 Hab. Neuse River, Raleigh, N. Carolina, E. Emmons, M. D. 



Unio squalidus. Testa. lsevi, subinflata, valde inaequilaterali, postice subbi- 

 angulata, antice rotundata; valvulis subcrassis, antice parum crassioribus; 

 natibus prominentibus ; epidermide furva, squalida, imbricata, eradiata; 

 dentibus cardinalibus parvulis, striatis, in utroque valvulo duplicibus; late- 

 ralibus sublongis, lamellatis subrectisque ; margarita caeruleo-alba vel purpu- 

 rea, et iridescente. 



Har. Neuse River, near Raleigh; Roanoke, near Weldon; and Deep River, 

 N. Carolina, E. Emmons, M. D. 



Unio Livingstonensis. Testa, laevi, oblonga, subinflata, fere alata, valde in- 

 aequilaterali, postice obtuse biangulata, antice rotundata; valvulis subtenuibus; 

 natibus subprominentibus ; epidermide tenebroso-fusca, eradiata vel obsolete 

 radiata; dentibus cardinalibus parvis, lobatis ; lateralibus longis, lamellatis sub- 

 rectisque ; margarita caeruleo-alba. vel purpurea, vel salmonia et valde iride- 

 scente. 



Hab. Livingston's Creek, Brunswick County, North Carolina, E. Emmons. 

 M. D. 



Unio quadrilaterus. Testa laevi, oblonga, subinflata, ad latere planulata, 

 inaequilaterali, postice biangulata et truncata ; valvulis crassiusculis ; 

 natibus prominulis, ad apices undulatis ; epidermide tenebroso-fusca, 

 eradiata vel obtuse radiata ; dentibus cardinalibus parviusculis, tuberculati3, 

 in utroque valvulo duplicibus ; lateralibus longis, lamellatis subrectisque ; 

 magarita, albida vel purpurea vel salmonia et valde iridescente. 



Hah. Abbeville District, South Carolina, Dr Barratt. Neuse River, Ra- 

 leigh and Catawba River, N. Carolina, C. M. Wheatley. 



Unio lucidus. Testa laevi, elliptica, inflata, valde inaequilaterali, postice 

 subbiangulata, antice rotunda; valvulis subtenuibus ; natibus prominulis; epi- 

 dermide rufofusca vel fusco-virente, radiata, ad latere micante ; dentibus car- 

 dinalibus parvis, obtuso-conicis, crenulatis, in utroque valvulo duplicibus ; lat- 

 eralibus sublongis, lamellatis subcurvisque ; margarita caeruleo-alba et valde 

 iridescente. 



Hab. Livingston's Creek, Brunswick County, North Carolina, E. Emmons, 

 M. D. 



Unio nasutidus. Testa laevi, valde transversa, compressa, ad latere planulata, 

 valde inaequilaterali, postice acute acuminata, antice oblique rotundata ; valvulis 

 subtenuibus ; natibus prominulis, fere terminalibus ; epidermide tenebroso-fusca, 

 radiata; deutibus cardinalibus parvissimis, acuminatis, in utroque valvulo 

 duplicibus; lateralibus praelongis, tenuibus rectisque ; margarita subsalmonia 

 et valde iridescente. 



Hab. Livingston's Creek, Brunswick County, N. Carolina, E. Emmons, M. D. 



Unio indefinilus. Testa laevi, oblonga, inflata, ad latere planulata, valde 

 inaequilaterali, postice biangulata, antice rotundata ; valvulis subcrassis, antice 

 parum crassioribus; natibus subprominentibus; epidermide fusco-nigricante ; 

 dentibus cardinalibus parviusculis, tuberculatis, striatis ; lateralibus longis, 

 lamellatis subcurvisque ; margarita alba, aliquantd purpurea et iridescente. 



Hab. Long Creek, Mecklenberg County, N. Carolina, C. M. Wheatley; and 

 Neuse River, near Raleigh, E. Emmons, M, D. 



Unio cistell.eformis. Testa, laevi, oblonga, valde inflata, ad latere planu- 

 lata, inaequilaterali, postice obtuse biangulata, antice rotunda ; valvulis cras- 

 siusculis ; natibus prominulis; epidermide fusco-nigricante, eradiata; denti- 



[July, 



