:SSS^;0&.S^^^^^^^^^ . 



£ 



■■^, 





LI I. 



ALLIGATOR MISSISSIPIENSIS. 



TRANSVERSE SECTION OF THE MEDULLA OBLONGATA 



MADE THROUGH ITS POSTERIOR PART. 



Gelatine Negative No. ij6. Miller Bros. 2 1-2 Iiieh. 



