187 ANNALS OF THE CARNEGIE MUSEUM. 
Specimens from Wampum are in the Carnegie Museum. In the 
Philadelphia Academy, of four specimens thus labeled, only one was 
this species, the rest young Lampszlis igamentina. 
29. Unio pustulosus Lea = Quadrula pustulosa (Lea). 
From Coraopolis in Philadelphia Academy; from Wampum in 
Philadelphia Academy and Carnegie Museum. 
30. Unio rectus Lamarck = Lampsilis recta (Lamarck). 
From Coraopolis and Beaver in the Philadelphia Academy. 
Unio rubiginosus Lea = Quadrula rubiginosa (lea). 
From Coraopolis in the Philadelphia Academy. 
Unio securis Lea = Plagiola securis (Lea). 
From Coraopolis in the Philadelphia Academy. 
33- Unio triangularis Barnes = Zruncilla triguetra Rafinesque. 
From Coraopolis and Beaver in the Philadelphia Academy ; from 
Wampum in the Philadelphia Academy and Carnegie Museum. 
Unio trigonus Lea. 
Doubtfully reported by Rhoads from Coraopolis. The specimens 
in the Philadelphia Academy under this name are young Quadrula 
rubiginosa (Lea). 
34. Unio tuberculatus Barnes = 77itogonia tuberculata (Barnes). 
From Coraopolis in the Philadelphia eiganee & ; from Wampum in 
the ses ee Museum. 
Unio verrucosus Barnes = Quadriula tuberculata (Rafinesque). 
ee Coraopolis and Beaver in the Philadelphia Academy ; from 
Wampum in the Philadelphia Academy and Carnegie Museum. 
Finally, C. T. Simpson (Proceedings United States National Mu- 
seum, 22, 1900, p. 553) records Lampsilis fatua (Lea) from the 
3eaver River, Pennsylvania. ‘The specimen, upon which this record 
is founded, belongs to the Carnegie Museum, and is from Wampum, 
collected by Clapp and Smith, and is nothing but Lampsz/zs tris (Lea). 
During his investigations, the writer has discovered a number of 
additional species in western Pennsylvania. A list of all known 
species is submitted here, giving the references to the older writers, 
indicating the general distribution and giving in the case of the rarer 
species the exact localities. Besides the material collected by the 
writer other material belonging to the Carnegie Museum has been 
used. Aside from the fine collection made at Wampum, Lawrence 
County, by Clapp and Smith, and the duplicates from the Rhoads 
