Report of tee State Geologist. 109 



Dr. Green evidently made an erroneous citation of tbe locality of 

 these fossils. The Corniferous limestone does not occur near Xenia, 

 and is not known in Green county, Ohio; but an error of this kind is 

 not altogether surprising. No one's knowledge of the geology of Ohio 

 had then attained this degree of discrimination; of the origin of the 

 specimens the author had no personal knowledge; they had come to 

 him through the hands of a collector, upon the accuracy of whose 

 information it is not necessary, in a critical question, to put full 

 reliance. 



