KATURAL SCIENCES OF PHILADELPHIA. 161 



usculis ; natibus prorainentibus ; epidermide rufo-fusca, subsquamosa, obsolete 

 radiata, dentibus cardinalibus parvis corragatisque, laterali))us longis, lamel- 

 latis subcurvisque ; margarita vel alba vel purpurea vel salmouea et valde 

 iridescente. 



jya6.— Catawba River, N. C, C. M. Wbeatlej. 



Unio datus. — Testa la?vi, lato-elliptica, valde compressa, inaequilaterali, 

 postice obtuse angulata, antice rotundata ; valvulis subcrassis, antice parum 

 crassioribus ; natibus prominulis ; epidermide rufo-fusca, micanti, obsolete 

 radiata ; dentibus cardinalibus parviusculis, sulcatis erectisque ; lateralibus 

 prelongis, subcurvis, lamellatis corrugatisque ; margarita nubila, salmouea et 

 purpurea et valde iridescente. 



Ilab. — Paw Creek, Beaver Creek and Long Creek, N. C, C. M. Wheatlej. 



Uxio Beaverensis. — Testa Isevi, oblonga, compressa, ad latere planulata, 

 ina?quilaterali, postice obtuse angulata, antice rotunda; valvulis subcrassis, 

 antice parum crassioribus ; natibus subprorainentibus ; epidermide rubiginosa, 

 micanti, obsolete radiata ; dentibus cardinalibus longis, crassis, lameljatis 

 subrectisque ; margarita vel alba vel purpurea et valde iridescente. 



Hab. — Beaver and Long Creeks, N. C, C. M. Wheatley ; Carter's Creek, Ga., 

 J. Postell. 



Unio nubilus. — Testa laivi, oblonga, subcorapressa, insequilaterali, postice 

 subbiangulari, antice rotundata; valvulis crassis, antice crassioribus; natibus 

 prominulis ; epidermide tenebroso-fusca, eradiata ; dentibus cardinalibus cras- 

 sis, sulcatis corrugatisque ; lateralibus crassis, longis, corrugatis lamellatisque; 

 margarita nubila, salmouea et purpurea et iridescente. 



i/c/6.— Paw Creek, Mecklenberg Co., N. C, C. M. Wheatley. 



Unio Pawensis. — Testa Isevi, suboblonga, inflata, valde inaequilaterali, postice 

 subbiangulari, antice rotundata; valvulis subcrassis; natibus subprominenti- 

 bus, subtumidis ; epidermide tenebroso-fusca, squamosa, eradiata ; dentibus 

 cardinalibus parvis, corrugatis, subconicis ; lateralibus longis, lamellatis sub- 

 curvisque ; margarita vel alba vel purpurescente et iridescente. 



Hab. — Paw Creek, Beaver Creek, and Catawba River, N. C, C. M. Wheatley. 



Unio humerosus. — Testa laevi, elliptico-oblonga, compressa, ad latere planu- 

 lata, inffiquilaterali, postice obtuse biangulari, antice rotunda ; valvulis sub- 

 crassis, antice crassioribus ; natibus prominulis ; epidermide rufo-fusca, obso- 

 lete radiata; dentibus cardinalibus grandibus, sulcatis, partitis ; lateralibus 

 prelongis, lamellatis corrugatisque ; margarita salmonis colore tincta et valde 

 iridescente. 



ITafi.— Charlotte, Mecklenberg Co., N. C, C. M. Wheatley. 



Uxio genuinus. — Testa Irevi, elliptica, subinflata, inaequilaterali, postice sub- 

 biangulata, antice rotundata ; valvulis subtenuibus, antice crassioribus; nati- 

 bus subprominentibus ; epidermide luteola, valde radiata ; dentibus cardinali- 

 nalibus erectis, pyramidatis, in utroque valvulo duplicibus ; lateralibus longis, 

 subcurvis lamellatisque : margarita alba et iridescente. 



i/«6.— Bissel's Pond, Charlotte, N. C, C. M. Wheatley. 



Description of two new species of UNIONID.E from Equador. 

 BY ISAAC LEA. 



Unio Ortonii. — Testa plicata, lato-elliptica, compressa, valde inaequilaterali, 

 postice angulata, antice rotundata ; valvulis crassis, antice crassioribus ; nati- 

 bus prominulis; epidermide rufo-fusca, eradiata ; dentibus cardinalibus niulti- 

 partitis, flexuosis curtisque ; lateralibus prelongis, curvatis corrugatisque; 

 margarita albida et valde iridescente. 



Hub. — River Napo, Equador, S. Am., Prof. Orton. 



1868.] 



