NORTH AMERICAN CONCHOLOGY. 



2T1 



[With this number appeared "An attempt to exhibit a Synonymy of the 

 Western North American species of the genera Unio and Alasmodonta." 

 The list is here given, the paging referring to the reprint. — W. G. B.] 



Unio truncatus Raf. 

 U. undutus B., var. a. 

 elegans Lea. 

 interruptus Reif. 

 U. brevidens Lea. 

 lineolatus Raf. 



U. depressus R., y'ng. 

 securis Lea. 

 ellipsarius Raf. 

 U. ellipticus Barnes. 

 crassus Say. 

 fasciolaris Raf. 

 U. crassus Wood ? 

 pondcrosus Gray. 

 mucronatus Barnes, 

 young. 

 phaseolus Hildr. 

 planulatus Lea. 

 verrucosus Raf. 



U. tuberculatus Bar. 

 flavus Raf, 



U. rubiginosus Lea. 

 cyphius Raf. 



U. dSsopus Green, 

 metanevrus Raf. 



U. nodosus Barnes, 

 reflexus Raf. 



U. cornutus Barnes, 

 retusus Raf. 



U. stapes? Lea, var. 

 flexuosus Raf. 

 U. pileus Lea ? 

 nodulatus Raf. 



U. pustulatus Lea. 

 quadrulus Raf. 

 U. rugosus Barnes. 

 lack)- gmosus Lea. 

 asperrimus Lea. 

 nodulosus Wood. 

 U. bullatus Barnes. 

 verrucosus B., var. 



