Pkockei>inos Rochester Academy oi- Science, Vol-. 7. 



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Plate 3. 

 Mollusca of Monroe County. 



Melantho ponderosa, Say. 



" ponderosa, Say. After Binney. 



" decisa. Say. Says' figures, after Binney. 



Say. 

 " rufa, Hald. 



decisa var. obesa, Lewis. Lewis' type, after Ijinney. 

 " " heterostropha, Kirt. 



" " var. genicula. Con. 



" var. integra, Say. 



