Number 102 April 9. 192 1 



OCCASIONAL PAPERS OF THE MUSEUM OF 

 ZOOLOGY 



UNIVERSITY OF MICHIGAN 



Ann Arbor, Michigan Published by the University 



SHELLS FRO'M ALCONA, OSCODA AND CRAWFORD 

 COUNTIES, MICHIGAN 



By Mina L. Winslow 



The following list of species from Alichigan is offered as 

 a contribution to a knowledge of the fauna of the state. Al- 

 cona, Oscoda and Crawford Counties lie in the northeastern 

 part of the southern peninsula in a region where little col- 

 lecting has been done. The list is compiled from several 

 sources, the principal one a collection made in 191 7 by Crystal 

 Thompson and Helen T. Gaige at Harrisville and Greenbush, 

 Alcona County. The writer is indebted to Dr. Bryant Walker 

 of Detroit for further records of shells from Greenbush and 

 Killmaster. Alcona County. Other material in the Museum 

 of Zoology was collected by J. E. Reighard and N. A. Wood 

 in the course of a trip down the Au Sable River in 1903. 



The writer wishes to acknowledge the assistance of Dr. 

 Bryant Walker in naming the greater part of the collections 

 and in verfying or correcting the writer's identifications of 

 the 191 7 material. 



