BIBLIOGRAPHY OP 



U. Troostensis Lea. 

 Unio leptodon Raf. 

 U. planus Barnes. 



velum Say (female). 

 purpurascens Swains. 

 tenuissimus Lea. 

 lineolatus Raf. 

 U. depressus Raf. 

 securis Lea. 

 metanevrus Raf. 



U. itoilosus Barnes, 

 monodontus Say. 



U. soleniformis Lea. 

 mytiloides Raf. 



U. cordatus Raf. (young). 

 undatus Barnes. 

 pyramidatus Lea. 

 solidus Lea. 

 nasutus Say. 

 U. rostratus Val. 



Vaughanianus? Lea. 

 nervosus Raf. 



(J. donaciformis Lea. 

 zig-zag Lea. 

 nigrum Raf. 



U. cuneatus Barnes. 

 gibber Lea. 

 nodulatus Raf. 



U. pustulatus Lea. 

 obliquatus Raf. 

 U. sulcatus Lea. 



ridibundus Say (fern.) 

 obovalis Raf. 



U. ebenus Lea. 

 Ohioensis Raf. 

 U. levissimus Lea. 

 inflates Lea. 

 olivarius Raf. 



U. ellipsis Lea. 

 orbiculatus Hild. 

 U. abruptus Say. 

 ovatus Say. 



U. globosus Lea (female). 

 capax Green (female). 

 parvus Barnes. 



