168 PROCEEDINGS OP THE ACADEMY OF 



101. Eleocharis cylindrica is E. tenuis, Schultes, a variety with smooth 

 achenia. 



102. Eleocharis micro formis [a hybrid name] is near E. intermedia, 

 Schultes. 



103. Eleocharis acutisquamata is the E. palustris var. anachata, Torr. 



It will be perceived that all the new genera of Mr. Buckley's two papers, and 

 nearly all the new species, are either oversights or mistakes, which might have 

 been avoided. The painful duty I have had to perform was all the more neces- 

 sary, inasmuch as the true names of the plants could seldom have been ascer- 

 tained from the published descriptions in those papers. However excellent the 

 author's intentions, we can only regret a publication which entails upon our 

 science a hundred worse than useless synonyms, (a regret which I have reason 

 to believe Mr. Buckley now shares), and we should endeavor to prevent future 

 calamities of the kind. In this regard, understanding that a third paper of the 

 sort, upon a peculiarly difficult order of plants, has been printed in the Acade- 

 my's Proceedings, but not yet issued, I am confident that my motives will not 

 be misunderstood when I venture to suggest, that the credit both of the Acade- 

 my and of the author of the paper, no less than the interests of science, would 

 be most subserved by the cancelling of the sheets. 



Descriptions of Ten new species of TTNIONIDJE of the United States. 



BY ISAAC LEA. 



Unio grandidens. Testa, valde tuberculata, obliqua, ad umbones inflata ; 

 valvulis crassissimis, antice crassioribus ; natibus valde tumidis terminalibus- 

 que ; epidermide fusca, ; dentibus cardinalibus pergrandibus, percrassis corruga- 

 tisque ; lateralibus crassis, sublongis, obliquis et valde corrugatis; margarita, 

 alba et iridescente. 



Hab. Near Hot Springs, Arkansas, Byrd Powell, M. D, 



Unio speciosus. Testa omnino tuberculata, fere granulata,, quadrangulari, 

 valde compressa, ad latere planulata, subsequilaterali, postice subbiangulata et 

 cmarginata, antice rotundata ; valvulis subcrassis, antice paulisper crassioribus ; 

 natibus subelevatis, ad apices acuminatis et elogantissime perundulatis ; epi- 

 dermide viridi-lutea, substriata, vel obsolete radiata vel eradiata, submicanti ; 

 dentibus cardinalibus subgrandibus, compressis, obliquis, erectis, striatis, in 

 utroque valvulo duplicibus ; lateralibus rectis, sublongis obliquisque ; margarita, 

 argentea, et iridescente. 



Hah. Colorado River, near Lagrange, Texas, Prof. Forshey ; and Leon Co., 

 Texas, Lieut. E. F. Beale. 



Unio Leibii. Testa lsevi, quadra, subcompressa, valde inaequilaterali, pos- 

 tice emarginata, antice rotundata, valvulis subcrassis, antice crassioribus ; 

 natibus subprominentibus, fere terminalibus; epidermide straminea. eradiata,; 

 dentibus cardinalibus subgrandibus, erectis striatisque ; lateralibus curtis, rec- 

 tis crassisque. in utroque valvulo duplicibus; margarita alba et paulisper iri- 

 descente. 



Hab. Erie Co., Michigan, G. B. Leib, M. D. 



Unio Gerhakdtii. Testa subsulcata, elliptica, subcompressa, sublenticular!, 

 inaequilaterali, postice obtuse angulata, antice rotunda; valvulis crassiusculis, 

 antice paulisper crassioribus; natibus subelevatis ; epidermide straminea, radiis 

 capillaribus ; dentibus cardinalibus parviusculis, compressis, in utroque valvulo 

 duplicibus; lateralibus sublongis, lamellatis subcurvisque; margarita alba, et 

 valde iridescente. 



Hab. Chattanooga, Geo., Alexander Gerhardt. 



[April, 



