31 



in our county, and which are now known from a 

 large part of the country. 



The writer is working up the recent mollusca of 

 Ohio. All communications, and the sending of ma- 

 terials from all parts of the state will be highly ap- 

 preciated as they will help making the list of both 

 forms and localities more complete and valuable. 



Number of Species. 



Land Mollusca 62 



Fresh Water "Snails," 42 



Gastropoda 104- 



Unionida? 41 



Cycladidae 20 



Pelecypoda 61 



Total number 165 



1. Polvgyra alholabris Say . Rather common, var. 



minor. A small, thin shelled form was found 

 at New Philadelphia, on the bank along the 

 river. 



2. Polrgjra thyroides Say . Rather common. 



3. Polygyra multilineata Say. Not common, and 



generally rather small. 



4. Polygyra profunda Say. Scarce; Goshen, Blick- 



town,.on steep, wooded hillsides. 



5. Polygyra mitchelliana Lea. Quite scarce; low 



grounds near New Philadelphia. 



6. Polygyra pennsylvanica Green. Scarce ; variable 



in color. 



7. Polygyra tridentata Sa^^ Common; rather 



variable in size; a number of specimens w^ith- 

 out any teeth on the peristome, collected at 

 different places, seem to represent rather a 

 deficient form than a variety. 



8. Polygyra irauduhnta Ptls. (fallax auctt. nee. 



Say, teste Pilsbry.) Not very common, 

 ialbin specimens are found occasionally. 



9. Polygyra palliata Say. Scarce. 



10. Polygyra inflecta Say. Rather scarce. 



