256 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL, 64 



DESCRIPTION OF PLATE zi 



PAGE 



Block of sandstone with Lonchocephalus ctiippewaensis and several other 



species characteristic of the Eau Claire formation of Wisconsin 190 



A. Hyolithes primordialis Hall. 



B. AnomocarcUa onusta (Whitfield). 



C. Pagodia thca Walcott. 



D. Lonchocephalus chippezvanesis Owen (p. 190, and see pi. 34). 



E. Menomonia calymenoides (Whitfield) (p. 162). 



F. Crepicephalus iowensis (Owtn) (p. 207). 



G. Dicellomus politus Hall. 

 H. Oholus matinalis Hall. 



U. S. National Museum, Catalogue No. 61737. 



From locality 83a, Upper Cambrian : Eau Claire formation ; 

 Rock Falls, Dunn County, Wisconsin, 



