I SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 85. NO. 3, PL. 15 



l: f ' -'..^^tSSi^^' -^" 



'"•■^■^ 





■■■■ ;'*^j^^ ?K 



'.^*^;5V A^'-- 



Burgess Shale Fossils 



For explanation see page 42. 



