NATURAL SCIENCES OF PHILADELPHIA. 305 



July 2ith. 

 Dr. B. H. Coates in the Chair. 



Nineteen members present. 



A paper was presented for publication entitled 



" Description of a new species of Cephalopod from the Eocene of 

 Texas." By Wm. M. Gabb. 



And was referred to a Committee. 



Dr. Leidy mentioned that he had recently found near Jackson, 

 New Jersey, a specimen of Hyla viridis or lateralis, a species 

 not previously found north of Baltimore. 



July 31s. 

 Dr. Emerson in the Chair. 



Seventeen members present. 



On report of the respective Committees, the following papers were 

 ordered to be published in the proceedings. 



Descriptions of Two New Species of UNIONES from Georgia. 



BY ISAAC LEA. 



Unio lingu^formis. Testa laevi, elliptica., cornpressa, ad latere planulata, 

 inaequilaterali, postice obtuse biangulata, antice rotundata, valvulis subte- 

 nuibus, antice crassioribus ; natibus prominulis ; epidermide pallido-lutea, 

 subnitida, virido-radiata, dentibus cardinalibus parviusculis, obtuso-conicis, 

 crenulatis, in utroque valvulo duplicibus ; lateralibus sublougis, lamellatis 

 subcurvisque , margarita alba et valde iridescente. 



Hab. Columbus, Georgia. 



Unio dispar. Testa lasvi, elliptica, subinflata, ad latere paulisper planulata, 

 valde inajquilaterali, postice obtuse angulata, antice rotundata; valvulis sub- 

 crassis ; natibus prominulis, ad apices undulatis; epidermide vel lutea. vel 

 oliva et valde radiata ; dentibus cardinalibus parviusculis, compressis, in 

 utroque valvulo duplicibus, erectis, crenulatis ; lateralibus longis, lamellatis 

 curvisque, margarita alba et iridescente. 



Hab. Columbus, Georgia, Bishop Elliott and G. Hallenbeck. 



Descriptions of Three New Species of UNIONES from Mexico. 

 BY ISAAC LEA. 



Unio Couchianus. Testa laevi, quadrata, inflata, biemarginata, ad latere sul- 

 cata, inaequilaterali, postice biangulata, antice rotunda ; valvulis crassis, antice 

 crasssioribus ; natibus prominentibus ; epidermide olivo-fusca, striata, eradi- 

 ata; dentibus cardinalibus subgrandibus, erectis, rugoso-striatis, crenulatis; 

 lateralibus sublongis, crassis curvisque ; margarita. argentea et valde irides- 

 cente. 



Hab. Rio Sa'lado, New Leon, Mexico, L. Berlandier, M. D. 



Unio Saladoensis. Testa, laevi, obovata, inflata, inaequilaterali, postice et 

 antice rotundata; valvulis subtenuibus, antice paulisper crassioribus; natibus 

 prominulis, laevibus ; epidermide luteo-oliva, polita radiataque ; dentibus 

 cardinalibus parvis, lamellatis, obliquis ; lateralibus sublongis, lamellatis sub- 

 curvisque ; margarita caeruleo-alba. et iridescente. 



Hab. Rio Salado, New Leon, Mexico, L. Berlandier, M. D. 



I860.] 



