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Plate 16. Fig. 1. Musk Turtle, Sternaiherus odoraiiis. Philadelphia, Pennsylvania. 

 Length of carapace 4'/2 inches. Photo by Mark Mooney, Jr. Fig. 2. Sn?pping Tu-tle, 

 Chehdra serpentina. Catawba Island, Ottawa County, June 21, 1931. Weight 20 

 pounds. Photo by L. D. Hiett. Fig. 3. Spotted Turtle, Clemmvs giidaia. A:!ams 

 Twp., Lucas County. May, 1932. Length of carapace about 4'/4 inches. Photo by 

 L. D. Hiett. 



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