5 
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in full the new system which had been worked out by Dr. Charles 
Schuchert of the United States Museum and himself. 
After explaining the new nomenclature, Dr. Clarke spent 
‘ 
some additional time in describing the “ Transition Fauna of the 
Portage and Chemung Epoch.” By means of maps and charts 
he showed that there was a gradual change in the forms in the 
different eras and that the fauna was varied in rocks of the same 
time in different parts of the state. 
