GEOLOGICAL AND NATURAL HISTORY SURVEY OF CANADA 



ALFJRED K. C. SELWYN, LL.D., P.E.S., F.G.S., Director. 



CONTRIBUTIONS 



TO THE 



^ I ^^ ' PALJ^.ONTOLQ G Y 



ojv;riiE 



CAMBRO-SILURIAN ROCKS OF CANADA. 



BY AETIIUrv IT. FOOED, F.G.S., 



ASSISTAXT rALiEOXTOLOGIST AND ARTIST TO THE SURVEY. 



OTTAWA: 



PRINTED BY jMAOLEAX, ROGER & CO., WELLINGTOX STREET 



1883. 



