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The Fossils of the Red Wall Compared with Those w the: 

 Kansas Coal Measures. 



By Albert B. Keaoan. 



For the purpose of definitely determining the age of tlie upper half of 

 the Red Wall 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. W. Beede's Carboniferous Invertebrates of Kansas (Univ. 

 Geol. Surv. of Kansas, vol. YI, 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 100th meridian, vol. Ill, p. 178); some by Prof. 

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

 meridian); the others by the writer, under 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. 



Archaeocidaris ? 

 Archaeocidaris tudifer. 

 Derbya ? 

 Derbva crassa. 



Derbya Kuokuk. 

 Derbya affinis. 



Ohonetes mesolobiis. ^ 



KANSAS FOSSILS. 



Fusulina secalica. 

 Anolopra anna. 

 Camphophyllum torquum. 

 Limopteria alata. 

 Trachypora austini. 

 Archaeocidaris agassiz. 

 Archaeocidaris tudifer. 

 Derbya bennetti. 

 Derbya crassa. 

 Derbya cymbula. 

 Derbya biloba. 

 Derbya Kuokuk. 



Chouetes granulifer. 

 Ohonetes mesolobus. 

 Chonetes glabcr. 

 Ohonetes vernemliauus. 

 Productus pertenius. 

 Productus symmetricus 



