SUMMARY 



585 



eluding the zone of the second arrival of Cryptolithus. The following 

 table will express my present opinion of the correlation of a part of the 

 Ordovician strata. It should be said by way of explanation that Co- 

 bourg 1 * had to be substituted for the Picton of previous papers because 

 of the preoccupation of the latter term, and that the name Gloucester 15 

 was proposed for the "Utica" black shale of Ontario which overlies the 

 Collingwood black shale and limestone. Neither term is new here. 



COREELATION TABLE 



Central Tennessee 



Central Kentucky 



Ontario 



Central New York 



Leipers 



Fairmont 

 Mount Hope 



Lorraine (part) 





Million 



Gloucester 

 Collingwood 







Frankfort 



Catheys 



Cynthiana 



Cobourg 



Utica 



Perryville 





Lower Cobourg 



Ward 

 Bigby Dove 

 Capitol 

 Hermitage 



Woodburn 



Brannon 



Benson 



Jessamine 



Prasopora beds 

 Typical Trenton 







Wanting 



Logana 



Hull 

 Rockland 



Glens Falls 





Curdsville 



Amsterdam 







General 

 Wanting 



emergence 









Carters 



Leray 





Tyrone 





Lowville 





"Canada Dept. Mines, Geological Survey, Mus. Bull. no. 31, 1921, p. 1. 

 15 Bull. Mus. Comp. Zool., vol. 56, no. 3, 1916, p.. 255. 



