CATALOGUE OF UNIOS, ETC. 17 



IVO. 53. UulO undatlfti^, Barnes, 

 caridiacea, Say. 

 mytiloides, Raf. 

 obliqua, Lam, 

 pyramidatus, Lea. 



JVo. '54« UlliO llUdulatUS, Barnes. 



heros, Say. 

 multiplicatus, Lea. 



IVo. 55. Unio ventricosus, Barnes. 



cardium ? Raf. 

 occidens, (female,) Lea. 

 subovatus, (male,) Lea. 



i¥o. 56. Unio verrucosus, Barnes, 

 tuberculata, Raf. 

 graniferus, Lea. 



No. 57. Alasmodonta ambig^ua, Say. 



Unio Hildrethianus, Lea. 



No. 58. Alasmodonta calceola, Lea. 



deltoidea ! Lea. 

 Unio calceola, Lea. 



