DETAILED GEOGEAPHIC DISTRIBUTION. 



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Geographic distribution of North American specks of Cambrian Brachiopoda — Continued. 



Note.— The letters placed opposite each species in the various columns denote the State or province in which the species occurs; for instance, 

 a "C ' in column 2 under A indicates that the species occurs in Cape Breton, "CN" indicates that it occurs in both Cape Breton and New 

 BrunswieK. 



a This species also occurs in Virginia and Maryland. 



