240 H. W. SHIMER >FIRIFEROIDS OF LAKE MINNEWANKA SECTION 



characteristic fascieulation of the plications is well seen in some of the 

 forms. 



Eange. — Extensively distributed in both the Mississippi Valley and 

 the Eocky Mountains. At Lake Minnewanka it is common — the most 

 abundant if not the only Spirifer — in the upper portion of the Upper 

 BanfT limestone. 



