ORTMANN: UNIONID& OF WESTERN PENNSYLVANIA. 186 
19. Unio luteolus Lamarck = Lampsilis luteola (Lamarck). 
From Coraopolis and Wampum in Philadelphia Academy and 
Carnegie Museum. 
20. Unio metanevra Rafinesque = Quadrula metanevra ( Rafinesque ). 
From Coraopolis in Philadelphia Academy and Carnegie Museum ; 
from Beaver in Philadelphia Academy, 
Unio multiradiatus Lea = Lampsilis multiradiata (Lea). 
From Wampum in Philadelphia Academy and Carnegie Museum. 
22 and 23. Unio obliquus Lea (sic!) = Quadrula obliqgua (Lamarck ) 
and Quadrula subrotunda (Lea). 
Specimens from Coraopolis in Philadelphia Academy and Carnegie 
Museum are in part od/gua, in part swbrotunda. From Beaver there 
are only five specimens of swérofunda in the Philadelphia Academy. 
One specimen from Beaver in the Philadelphia Academy was labeled 
varicosa Lea = Pleurobema cicatricosum (Say), but it is an old swd- 
rotunda. P. cicatricosum is not found in western Pennsylvania. 
24. Unio ovatus Say = Lampsilis ventricosa ovata (Say) and Lamp- 
silts ventricosa (Barnes). 
A few specimens from Coraopolis in the Philadelphia Academy and 
the Carnegie Museum represent the var. ovata the larger part the 
typical ventricosa. A specimen from Beaver in the Philadelphia 
Academy is var. ovata. ‘he specimens from Wampum in the Phila- 
delphia Academy and the Carnegie Museum are all vend¢ricosa. 
25. Unio parvus Barnes, probably = Wicromya fabalis (Lea). 
Rhoads reports one specimen from Wampum. It could not be 
found in the Philadelphia Academy. The Carnegie Museum _ pos- 
sesses a number of specimens of JAZicromya fabals from Wampum, 
and since the latter species is not mentioned by Rhoads, it is very 
likely that he confounded it with Lampszls parva. 
26. Unio phaseolus Hildreth = Pivchobranchus phaseolus (Hildreth). 
From Wampum in the Philadelphia Academy and the Carnegie 
Museum. 
27. Unio plicatus Lea = Quadrula undulata (Barnes). 
A specimen from Beaver, and a number of specimens from Wam- 
pum in the Philadelphia Academy and the Carnegie Museum are all 
undulata. Quadrula plicata has not been found in the Ohio drainage 
in Pennsylvania, while Q. wnudulata is quite abundant, chiefly so in 
the Beaver drainage. 
28. Unio compressus Deshayes = Symphynota compressa (Lea). 
