MEMOIRS 



of tup; 



BOSTON SOCIETY OF NATURAL HISTORY; 



VOLUME 111. NUMBEE XIV. 



A NORTH AMERICAN A NTHURUS — ITS STRUCTURE 

 AND DEVELOPMENT. 



WITH PLATES XLIX — L. 



In EDWARD A. BURT. 

 INDEX AM) TITLE PAGE OF VOL. III. 



BOSTON : 

 published by the society. 

 October, 1894. 



