504 



REPORT ON NATIONAL MUSEUM, 1886. 





1 



1 



Geology of Ohio, Report of 

 Progress, 1869, p. 152. 



Geology of Ohio, Vol. n, part 

 l,p.669. 



J. L. Cassels. 



Geology of Ohio, VoL ii, part 



1, p. 672. 

 Geology of Ohio, Report of 



Progress, 1870, p. 287. 

 Geology of Ohio, Vol. i, part 



1, p. 474. 



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