191 ANNALS OF THE CARNEGIE MUSEUM. 
This species is recorded in Harn’s list from western Pennsylvania, 
in Clapp’s list from Allegheny County, and it occurs in the Ohio 
River according to Rhoads. 
It is found in the larger rivers and is generally rather abundant. In 
the Allegheny it goes up as far as Warren County, where it also enters 
the Connewango Creek. It is in French Creek in Venango and Craw- 
ford Counties. Inthe Monongahela River it goes up to Dunkard Creek 
and the Cheat River. Its former presence in the Conemaugh River 
at New Florence, Westmoreland County, has also been ascertained by 
the writer. None of the smaller creeks contain this species, and it is 
absent in the whole Beaver drainage. 
to. Lampsilis iris (Lea). 
Recorded in Harn’s list from western Pennsylvania. Simpson gives 
L. fatwa for the Beaver River. Thespecimen (from Wampum), upon 
which this record is based, is in the Carnegie Museum, and undoubt- 
edly is Z. zrzs. The writer found additional material of this form in 
the Beaver drainage, not far from Wampum. 
It is a rather rare species in our region, nowhere abundant, but scat- 
tered over a large area. It is most frequent in Little Beaver Creek, 
Beaver County, in the Mahoning and Shenango Rivers, in the Neshan- 
nock and Pymatuning Creeks in Lawrence and Mercer Counties. It 
is found also in Crooked Creek, Armstrong County, in French Creek, 
Crawford County, and in Dunkard Creek, Greene County, and the 
Cheat River, Fayette County. 
11. Lampsilis (Carunculina) parva (Barnes). 
Reported from western Pennsylvania by Harn. Rhoads’ U. parvus 
probably is AZzcromya fabals. 
The writer has found a single dead, but well preserved shell of this 
species in Conneaut Outlet, Crawford County. 
12. Proptera alata (Say). 
Given in Harn’s list as from western Pennsylvania; recorded by 
Stupakoff from Allegheny County, and by Rhoads from the Ohio River. 
Abundant in the Ohio and formerly in the Monongahela. Goes up 
in the latter to Dunkard Creek, Greene County, but not into the 
Cheat. In the Allegheny River it is found in Allegheny and Arm- 
strong Counties, but not very frequently, and does not go farther up. 
In addition it has been collected in the Little Beaver Creek at Cannel- 
ton, Beaver County (Miss Vera White), but not farther up. It is 
absent in the whole Beaver drainage. 
