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The Fossils of the Red Wall Compared with Those of the 

 Kansas Coal Measures. 



By Albert B. Reagax. 



For the purpose of detiuitely determining the age of the upper half of 

 the Red AVall limestone of the Rocky Mountains the writer has prepared 

 the following tabulated comparison of the fossils of that series of rocks 

 with those of the Kansas Coal Measures. The Kansas fossils were taken 

 from Dr. J. AV. Beede's Carboniferous Invertebrates of Kansas (Uuiv. 

 Geol. Surv. of Kansas, vol. VI, pp. 1-187, plates 1-22). Some of the Upper 

 Red Wall fossils were identified by Prof. Meek (see Gilbert's Report, U. S. 

 Geog. Surv. w. of the l(X)th meridian, vol. Ill, p. ITS); some by Prof. 

 White (see White's Report in vol. IV. U. S. Geog. Surv. w. of the 100th 

 meridian); the others by the writer, luider the direction of Dr. Beede of 

 the University of Indiana. The fossils identified by Meek are marked 

 (1), those by White (2). 



RED WALL FOSSILS. 



Fusulina secalica. 

 Camphophyllum torquum. 



Archff'ocidaris ? 

 Archaeocidaris tudifer. ' 

 Derbya ? 

 Derbva crassa. 



Derbya Kuokuk. 

 Derbya affinis. 



Ohonetes mesolobiis. * 



KANSAS FOSSILS. 



Fusulina secalica. 

 Anolopra anna. 

 Camphopliyllum torquum. 

 Limopteria alata. 

 Trachypora austini. 

 Archteocidaris agassiz. 

 Archaeocidaris tudifer. 

 Derbya beunetti. 

 Derbya crassa. 

 Derbya cymbula. 

 Derbya biloba. 

 Derbya Kuokuk. 



Cliouetes granulifer. 

 Ohonetes niesolobus. 

 Clionetes glabcr. 

 Ohonetes vememlianus. 

 Productus pertenius. 

 Productus svmmetricus 



