Ortmann : Unionid.'E of Western Pennsylvania. 185 



6. Unio alatus Say = Proptera alata (Say). 



From Coraopolis in Philadelphia Academy and Carnegie Museum ; 

 from Beaver in Philadelphia Academy. 



7. Unio coccineus Lea ^ Quadrula cocci nea (Lea). 



From \Vami)um in Philadelphia Academy and Carnegie Museum. 



8. Unio cooperianus Lea ^ Quadrula cooperiana (Lea). 



No specimens of this species could be found in the Philadelphia 

 Academy, and none are in the Carnegie Museum. But the writer has 

 found this species in the Ohio River in Beaver County, and thus the 

 record is confirmed. 



9. Unio cornutus Barnes = Obliquaria reflexa Rafinesque. 



From Beaver in the Philadelphia Academy. Rhoads reports it also 

 from Coraopolis, but no specimens from this locality have been seen 

 by the writer. 



10. Unio cylindricus Say = Quadmla cylindrica (Say). 



From Coraopolis and Beaver in Philadelphia Academy ; from Wam- 

 pum in Philadelphia Academy and Carnegie Museum. 



11. Unio crassidens Lamarck. 



From Coraopolis in Philadelphia Academy and Carnegie Museum ; 

 from Beaver in Philadelphia Academy. 



12. Unio donaciformis Lea = Plagiola donacifortnis (Lea). 



The specimens recorded from Coraopolis are in the Philadelphia 

 Academy. This species has not been found in recent investigations. 



13. Unio elegans Lea = Plagiola elegans (Lea). 

 From Coraopolis in Philadelphia Academy. 



14. Unio gibbosus Barnes. 



From Coraopolis in Philadelphia Academy and Carnegie Museum ; 

 from Beaver in Philadelphia Academy ; from Wampum in Philadelphia 

 Academy and Carnegie Museum. 



15. Unio irroratus Barnes (sic !) = Cyprogenia irrorata (Lea). 

 Only one specimen from Beaver in the Philadelphia Academy. 



16. Unio kirtlandianus 'Lea. = Quadrula subrotunda kirtlandiana 



(Lea). 

 From Wampum in Philadelphia Academy and Carnegie Museum. 



17. Unio lens Lea = Obovaria circtclus (Lea). 



From Coraopolis in Philadelphia Academy ; from Wampum in 

 Philadelphia Academy and Carnegie Museum. 



18. Unio ligamentinus Lamarck = Lampsilis ligamentina (Lamarck). 

 From Coraopolis and Wampum in Philadelphia Academy and 



Carnegie Museum ; from Beaver in Philadelphia Academy. 



