flDemotrs ot tbc flDuseum of Comparative Zoo'loox? 



AT HARVARD COLLEGE. 

 Vol. XXXVI. 



THE PLAGIOSTOMIA. 



(SHARKS, SKATES, AND RAVS). 



BY 



SAMUEL GARMAN. 



WITH SEVENTY - SEVEN PLATES. 



TEXT. 



CAMBRIDGE, U.S.A.: 



printeo for tbe flDuscum. 



September, 1913, 



