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NEW YORK STATE MUSEUM 



duced in any of the strata elsewhere exposed, and their attitude 

 toward the Perce strata farther north has just been expounded, from 

 which we may infer that these rocks are normally subjacent to the 

 latter and have been separated therefrom by the downthrow of the 

 superjacent mass. These Cap Barre beds, so far as exposed, may 

 attain a thickness of 75 to 100 feet. Their relations with the strata 

 at Mt Joli are determinable from no structural relation exhibited, 

 for they are separated from the latter by the long interval of the 



Cap Barre from North cove 



North cove. These beds contain fossils, but very sparsely. I have 

 found a few Lingulas and an Ambocoelia-like brachiopod probably 

 allied to Spirifer modest us Hall, which is a Helderberg 

 species, also a small corrugated Leptostrophia like L. oriskania 

 Clarke, but the age and position of the strata are decisively indicated 

 by the presence of a species of the trilobite Dicranurus. 



This fossil is of more than ordinary interest. The genus Di- 

 cranurus has been described heretofore only from two geologic 

 formations, the Helderberg (New Scotland beds and Coeymans 



