189 ANNALS OF THE CARNEGIE MUSEUM. 
4. Lampsilus ventricosa (Barnes). 
In Pennsylvania according to Call (Bull. Des Moines Acad., 1885). 
In Harn’s list this species is given from western Pennsylvania as 
U. occtdens and subovatus. In Stupakoff’s list it is cited from Alle- 
gheny County as U. cartosus. It is comprised in Rhoads’ U. ovatus 
from the Ohio and Beaver Rivers. 
The species is very generally distributed in the larger rivers as well as 
in the smaller creeks. It goes up in the Monongahela drainage to 
Dunkard Creek in Greene County and the Cheat River in Fayette 
County. In the Shenango it goes to Mercer County. It is in French 
Creek, and in the upper Allegheny in McKean County. It is found 
in Little Mahoning Creek in Indiana County, and in the Kiskiminetas 
drainage in the upper Loyalhanna River in Westmoreland County, and 
in Quemahoning Creek in Somerset County. It is locally rather 
abundant, sometimes the prevailing species, and attains large size, as 
for instance, in Little Beaver Creek in Beaver County, in the Slippery- 
rock Creek in Lawrence County, and in the upper Shenango in Mer- 
cer County. 
4a. Lampsilis ventricosa ovata (Say). 
This species is reported by Clapp from Allegheny County. A speci- 
men donated by Clapp is in the Carnegie Museum. It is also reported 
by Rhoads, but only specimens from Coraopolis and Beaver belong here. 
Call (1885) cites from ‘‘ Allegheny River to Central New York.’’ 
The species is rather abundant in the Ohio in Beaver County, and 
formerly was abundant in Allegheny County. It occurs in the Alle- 
gheny River all the way up to Warren County, and also in French 
Creek in Venango and Crawford Counties. It is entirely absent in all 
other parts, distinctly so in the Beaver and Monogahela drainages. 
Wherever found, it is associated with the typical Z. ventricosa and 
runs into it. ‘Thus it should be regarded as a variety of the latter. 
5. Lampsilis multiradiata (Lea). 
Reported by Harn from western Pennsylvania, by Rhoads from the 
Beaver River at Wampum ; not in Stupakoff’s and Clapp’s lists for 
Allegheny County. 
It occurs rarely in the larger rivers (Ohio in Beaver County, Alle- 
gheny in Armstrong County); more frequently farther up, for instance 
all over the Beaver drainage in Lawrence and Mercer Counties. It is 
in the upper Allegheny as far as Warren County, in French Creek and 
Connewango Creek; in the upper Loyalhanna in Westmoreland 
County, and the Quemahoning Creek in Somerset County, and in the 
