DETAILED STRATIGRAPHIC DISTRIBUTION. 



stratigraphic distribution of Cambrian and Ordovieian Brachiopoda — Continued. 

 Newfoundland; Manuels Brook, Conception Bay— Continued. 



141 



Five or six of the Xew York localities are scattering; the remainder may be sejjarated into two groups, Upper 

 Cambrian (Potsdam) and Lower Cambrian. In each of these divisions little stratigraphic differentiation is possible, 

 but the localities (see index for numbers) give all known stratigraphic data. 



Norway. 



See Sweden, Denmark, Finland, and Norway, where the horizons are differentiated and correlated, with com- 

 plete lists of the localities and included species. 



Nova Scotia. 



See Cape Breton and New Brunswick, where the horizons are closely differentiated and correlated, with com- 

 plete lists of localities and included species. 



Oklahoma: Arbuckle Mouutaiiis. 



For the Arbuckle limestone the section 7 miles north of Springer, on the south side of the Arbuckle Mountains, is 

 used, and for the Reagan sandstone a section measured by E. 0. Ulrich in sec. 2, T. 4 N., R. 13 W., on the north side 

 ■of the Arbuckle Mountains, 15 miles northwest of Fort Sill, 



a The section of the Arbuckle limestone was measured on the south side of the Arbuckle Mountains, 7 miles north of Springer. 



