28 CIRCULAR 520, U. S. DEPARTMENT OF AGRICULTURE 



lined living room. From it several passageways lead off in differ- 

 ent directions under water. Muskrats are heavily trapped for fur, 

 which ordinarily has a good valuation, considering their abundance. 

 The revenue from the sale of skins on some controlled lands or musk- 

 rat farms has proved equal to or even greater than that of nearby 

 agricultural lands. 



Other mammals, occasional visitors to the marshes, include the 

 otter (Lutra canadensis), the mink (Mustela vison), the raccoon 

 (Procyon lotor), and the opossum (Didelphys virginiana) , all prob- 

 ably well enough known for there to be no question as to identity. 



U.S. GOVERNMENT PRINTING OFFICE: 



For sale by the Superintendent of Documents, Washington, D. C. Trice 10 cents 



