CATALOGUE OF UNIOS, ETC. 15 



No. 46. I ilio rngosus, Bar^s. 



^x^quadrula 1 Raf. 

 / lacrymosus, Lea. 



asperrimus, Lea. 







No. 47. Unio Sayii, Ward. 



/ No. 48. Unio securis, Lea. 

 depressal Raf. 



No. 49. UlliO Siliquoideus, Barnes, 

 inflatus, (female,) Barnes. 



No. 5O. Unio sulcatus, (male,) Lea. 

 ridibundus, (female,) Say. 



No. 51. Unio triangular is, Barnes. 



cuneatus, Swainson. 

 formosus, (male,) Lea. 

 triqueter] Raf. 



/ No. 52. Unio tuberculatus, Barnes, 

 tuberculosus, Valencienes. 

 verrucosa, Raf. 



