207 ANNALS OF THE CARNEGIE MUSEUM. 
‘There are specimens in the Carnegie Museum from the Schuylkill 
Canal at Manayunk, Philadelphia County (H. J. Gera); the Dela- 
ware River, Yardley, Bucks County (Ortmann); Raystown Branch 
of the Juniata River, Bedford, Bedford County (A. Koenig); Cush- 
Cushion Creek, Green Township, Indiana County (Atkinson). 
g. Alasmidonta undulata (Say). 
The species is reported from the Delaware and Schuylkill Rivers 
(Say, Gabb); and several smaller streams in Bucks, Philadelphia, 
Delaware, Montgomery, Chester, and Lancaster Counties (Schick, 
Gabb, Hartman & Michener, Bruckhart). Harn gives this species for 
** western Pennsylvania’’ (see above). 
A large specimen from the Hartman collection, labeled ‘‘ Kimber- 
ton Dam, Chester County’’ is in the Carnegie Museum. ‘There are 
also specimens from the Schuykill Canal, Manayunk, Philadelphia 
County (H. J. Gera) ; Delaware River, Yardley, Bucks County (Ort- 
mann) ; West Branch Mahantango Creek, Richfield, Juniata County 
(Atkinson) ; Raystown Branch of the Juniata River, Everett, Bed- 
ford County (P. E. Nordgren) ; Shober’s Run, Bedford Springs, Bed- 
ford County (A. Koenig) ; Frankstown Branch of the Juniata River, 
Hollidaysburg, Blair County (Ortmann) ; Beaver Dam Creek, Flin- 
ton, Cambria County (Atkinson) ; Swartz Run, Ashville, Cambria 
County (Ortmann). 
1o. Alasmidonta (Pressodonta) hetorodon (Lea). 
Schuylkill River, Darby Creek, (Lea, Gabb, Conrad, Hartman & 
Michener) ; Neshaminy Creek, Bucks County (Schick); Canal at 
Manayunk (Schick). 
There is in the Carnegie Museum only a single individual from the 
last named locality (H. J. Gera coll.). 
11. Alasmidonta (Rugifera) marginata varicosa (Lamarck). 
Schuylkill River, Philadelphia (Lamarck) ; small creeks in Bucks, 
Delaware, and Chester Counties (Schick, Hartman & Michener) ; 
Lancaster County (Bruckhart). 
There are specimens in the Carnegie Musuem from the following 
localities: Lehigh River, Bethlehem, Northampton County (Holland 
Collection) ; Delaware River, Yardley, Bucks County (Ortmann) ; 
Susquehanna River, Duncannon, Perry County (Ortmann) ; Juniata 
River, Juniata Bridge, Perry County (Ortmann) ; Frankstown Branch 
of the Juniata River, Huntingdon and Alexandria, Huntingdon County 
(Atkinson) ; Raystown Branch of the Juniata River, Ardenheim, 
