4IO SMITHSONIAN MISCELL?\NEOUS COLLECTIONS VOL. 64 



listed as Illcenurus in 1886 and 1891 has not been found in the 

 collection. 



The stratigraphic position of the Chisholm shale corresponds in a 

 general way to the Spence shale of the Ute formation of southern 

 Idaho." 



Smithsonian Misc. Coll., Vol. 53, 1908, pp. 7, 8, and 197. 



