FIG. 6l. SKULLS OF WEASELS, ETC. 
I. Mustela caiirina origenes. 2. Lutreola vison energumenos, 
3, Putorius nigripes. 4. Putorius longicauda. 5. Putorius 
arizonensis. 6. Putorius streatori leptus. 
All slightly reduced 
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