2 University of Michigan 



List of Species^ 



Folygyra olbolabris (Say). Alcona County: Harrisville, 

 Crystal Lake. Oscoda County: ]\IcKinley. Crawford Coun- 

 ty: 3 miles east of Grayling. 



Polygvm fratcnia (Say). Alcona County: Harrisville. Os- 

 coda County : McKinley. 



Pulygyra Jiioiwdon (Rackett). Oscoda County. 



Polvgyra sayaua Pilsbry. Alcona County: Harrisville. Os- 

 coda County : near Butler Bridge. 



Circinaria concava (Say). Alcona County: Harrisville. x\ 

 small form, the largest measuring: altitude 7, diameter 13 mm. 



Vitrina liiiipida Gould. Alcona County: Harrisville. 



Vitrca binncyana (Morse). Alcona County: Harrisville, 

 Greenbush. 



Vitrea ferrca (]\Iorse). Alcona County: Harrisville,. 



Vitrca hauunonis (Strom) (^^ radiatiila Alder). Alcona 

 County: Harrisville. Oscoda County: AfcKinley. 



Vitrca multidentata (Binney). Alcona County: Harrisville. 

 Two specimens, of which one has a solid bar in place of one 

 row of the internal teeth. Pilsbry- says: "... with ordinary 

 specimens of iiiultidoitafa there sometimes occur shells in 

 which radial barriers similar to those of / '. lamclV.dcns re- 

 place the teeth of the normal form. Such specimens are 

 known from : W. Granby, Hartford Co., Conn. ; Garrettville, 

 O. ; Greenwich, X. Y. (Acad. Coll.) ; Deering, X. H. ; Litch- 

 field, X. V. (C(j11. G. H. Clapp) ; Ottawa, Can. (Coll. Bryant 

 Walker), and Ithaca, X. Y. (Coll. IL E. Sargent)." This 

 record adds another locality to the list. 



' Unless otherwise specified localities are in or near the Au Sable 

 River. 



Troc. Acad. Xot. Sci., Phila.. 1903, p. 208. 



