S. GEOLOGICA L SURVEY OF TflE TERRITORIES. 



PLATE X: 





.y 



.,y 



•■'^iM-,'^^ 



r 





,t'f-^'^^ 



% 



.^-^'X 



'j 



'9 



<M\^ 



N&u 



\ 





iJ^F^ 





.f 





'. i 



9 





O ^ "^ s< 





.,=# 





"^■«W^ 



V 



11-26 COCHLIOPODIUM BILIMBOSUM 26 ~ es C X-'ESTITUM. 



29 - 37 CEMTROPXIS ACUJ^EATA, 



