Cobban (I) (concluded) 



1958 Two new species of Baculites from the 

 Western Interior region. 12 



1959 Revision of the Colorado Group on 

 Sweetgrass Arch, Montana. 13 



1961 Ammonites from the Seabee Fromation 



(Cretaceous) of northern Alaska. 14 



1961 The ammonite family Binneyitidae Roe- 

 side in the Western Interior of the 



United States. 15 



1962 New baculites from the Bearpaw Shale and 

 equivalent rocks of the Western Interior. 16 



1962 Baculites from the lover part of the Pierre 

 Shale and equivalent rocks in the Western 

 Interior. 17 



