136 THE NAUTILUS. 
Pyramidula striatella Anth. West Park, common; Wissahickon, 
common; Westville, N. J., one specimen; near Strawberry Man- 
sion, where, in Nov., 1893, they were found congregated in immense 
numbers (Vanatta). 
Pyramidula (Helicodiscus) lineata Say. Lansdowne Valley, un- 
common ; Wissahickon, a few specimens; near Strawberry Mansion 
(E. G. Vanatta) ; Germantown (R. Walton; Stone) ; near 58th St. 
Station, P. W. & B. R. R. (Pilsbry) ; “ Found by Robert E. Griffith, 
near Philadelphia.” (Say.); Westville, N. J. (Fox). 
HELICIDE. 
Polygyra ( Triodopsis) thyroides Say. West Park, common; Wis- 
sahickon, common; Westville, N. J..common; Monument Ceme- 
tery (E.G. Vanatta); Fisher’s Station, Germantown, and Fern 
Rock (Stone). 
Polygyra (Triodopsis) albolabris Say. Wissahickon; Laurel 
Hill Cemetery ; Perkiomen (Johnson) ; Fern Rock, rare (Stone) ; 
Westville, N. J. (Fox). 
Polygyra (Triodopsis) tridentata Say. Wissahickon, moderately 
common. 
Polygyra ( Triodopsis) tridentata juatidens Pils. West Park, and 
Laurel Hill Cemetery, common. 
Polygyra (Triodopsis) fallax Say [H. introferens Bld.]. Flat 
Rock Dam, rare (R. Walton); Monument Cemetery, rare (E. G. 
Vanatta); Atco, N. J. (Fox); “ Presented to the Academy by 
Messrs. Hyde and Mason who found it in the vicinity of Philadel- 
phia where it is not uncommon.” (Say.) 
Polygyra (Stenotrema) hirsuta Say. West Park, uncommon ; 
near Strawberry Mansion (E. G. Vanatta) ; Perkiomen (Jchnson). 
Polygyra (Stenotrema) monodon Rack. Strawberry Mansion (Ford) ; 
Perkiomen (C. W. Johnson). 
Vallonia pulchella excentrica Sterki. Ruins near School Lane, 
common; Falls of Schuylkill (E. G. Vanatta); Fisher’s Station, 
Germantown, common (Stone). 
Vallonia costata Mill. East bank of Schuylkill, at Flat Rock 
Dam, very common; Falls of Schuylkill (E. G. Vanatta). 
-PUPIDE. 
Pupa armifera Say. Ruins near School Lane, common ; Falls of 
Schuylkill (E. G. Vanatta). 
ee 
