





^ 



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a%: 



■^-5^J's.:?r^- 



XLVI. 



-.fe. 



,:»^ 



ALLIGATOR MISSISSIPIENSIS. 



TRANSVERSE SECTION MADE ABOUT ONE CENTIMETER 



BEHIND THE FOURTH VENTRICLE. 



Gelatine Negative No. ijo. Miller Bros. 21-2 Inch. 



