II, 



MEMOIRS 



OUQA*. M / 



%^ 



OF THE 



BOSTON SOCIETY OF NATURAL HISTORY. 



VOLUME III. PART I. NUMBER III. 



PALAEOZOIC COCKROACHES : 



A COMPLETE REVISION OF THE SPECIES OF BOTH WORLDS, 

 WITH AN ESSAY TOWARD THEIR CLASSIFICATION. 



By SAMUEL H. SCUDDER. 



(Read May 7, 1S79.) 



BOSTON : 



published by the society. 



November 29, 1879. 



