Shell-Bearing Mollu 



CATALOGUE OF THE SHELL-BEARING MOLLUSC A 

 OF PORTAGE COUNTY, OHIO. 



By Geo. W. 



The following pages are the resi 



Corbiculida? hut it exists in nearly all the genera. 



I have no doubt that species new to the county will yet he 



Margm-itaua Inldrethiana Lea, will he found in the south 

 branch of the Mahoning in the township of DeerfieM. 



I think also that the Rissoids will be increased by the dis- 

 covery of new forms. 



My thanks are due to S. M. Luther and Geo. J. Streator for 



Idass GASTROPODA. 

 b-Class PULMONATA. 



Family ZoNl 

 ienus Z&nties, 

 don IhjnUna 



Zonites arbor cus Say. 



Common everywhere in woods and under logs. It is 

 naturally an upland species, but it is often found in wet places. 

 Zonitcs nitidus Mull. 



Not so common as the above but is often found in largo 

 numbers in wet places, subject to occasional overflow. This 

 is the largest of our Hyalinas. 



