19 



Unio EiGHTsn. — Test4 plicata, quadrats, subcompressa, maxime undulata 

 usque ad natium apices, valde insquilaterali ; valvulis crassissimis, antic* 

 crassioribus ; natibus elevatis, compressis, ad apices rugoso-undulatis ; epider- 

 mide tenebroso-fusca, eradiata, striata; dentibus cardinalibus magnis, crassis 

 et valde striatis-; lateralibus longis, crassis, lamellatis subcurvisque ; marga- 

 rita alba et valde iridescente. 



Hab. — Texas and Sabinas River, New Leon, Mexico, James Eights, M. D. 



Unio quadrans. — Testa la?vi, quadrata, valde ventricosa, subffiquilaterali. 

 postice obtuse angulata, antice subtruncata ; valvulis crassis, antice paulisper 

 crassioribus ; natibus elevatis, tumidis ; epidermide tenebroso-fusca, eradiata. 

 transverse striata; dentibus cardinalibus magnis, valde compressis, striatis 

 crenulatisque ; lateralibus longis, crassis curvisque ; margarita alba et iride- 

 scente. 



Hah.— Texas, Mr. C. M. Wheatley. 



Anodonta Kennerlyi. — Testa lsevi, elliptica, subcylindracea, subventricosa. 

 valde inaquilaterali, antice subtruncata, postice biangulata ; valvulis tenuissi- 

 mis, diaphanis ; natibus vix prominentibus, ad apices exilissime undulatis ; 

 epidermide luteo-oliva, micante, ad margine striata, eradiata : margarita eae- 

 ruleo-alba et valde iridescente. 



Hab. — Chiloweyuch Depot, near Puget's Sound, Washington Territory, 

 C. B. Kennedy, M. D. 



Descriptions of Six New Species of UNIONIDiE from Alabama. 

 BY ISAAC LEA. 



[Read July 3d, I860.] 



Unio Showalterii. — Testa, lavi, subrotunda, crassi, sublenticular!, aequila- 

 terali; valvulis crassis, antice crassioribus ; natibus elevatis, tumidis ; epider- 

 mide tenebroso-fusca, eradiata ; dentibus cardinalibus crassis, erectis, compres- 

 sis, in utroque valvulo duplicibus ; lateralibus brevibus, percrassis corruga- 

 tisque ; margarita argentea et valde iridescente. 



Hab. — Coosa River, Watumpka, Alab., E. R. Showalter, M. D. 



Unio Hartmanianus. — Testa laevi, oblique triangulari, crassa, tumida, postice 

 subbiangulari, insquilaterali ; valvulis percrassis, antice crassioribus; natibus 

 valde elevatis, crassis ; epidermide tenebroso-fusca, postice luteola, eradiata ; 

 dentibns cardinalibus subgrandibus, erectis, compressis, corrugatis, in utroque 

 valvulo duplicibus ; lateralibus brevibus, percrassis, obliquis corrugatisque ; 

 margarita argentea et iridescente. 



Hab. — Coosa River, Watumpka, Alab., E. R. Showalter, M. D. 



