Plate XXXVI. 



Monograph- OYSTER-mOV ST RT. 



Baltimork Oyster-Sjiuckixg Trough. 



/rw>} 



N-. 



jfl' *^mn 



u 



Oysteu-Knivks, c)k Divkusk I'attkuns, r.sKn in Nkw England, New York, axi> the 



(jriESAPEAKK Region. 



