251 



Fistulipora nodulifera. 

 Modiola (?) ? 

 MuTchisouia sp. 

 Platysomus- sp. 

 Phillipsia- sp. 

 Nautilus occideutalis. 

 Euoniphalus (like E. nodosus).' 

 Euomphalus peniodosus. 

 Macrocheilus^ sp. 

 Pleurotonieria^ sp. 



Belleroplion crassus. 

 Dielasnia bovidines. 

 Seminula argeutia. 



Fistuipora nodulifera. 

 Modiola sulbelliptica. 

 Murehisouia sp. 



Phillipsia sp.* 

 Nautilus planovolvis. 

 Euoniphalus sp.* 

 Euomphalus peruodosus.* 



Pleurotomeria tabulata. 

 Pleurotoiueria sp. 

 Belleroplion crassus. 

 Dielisma bovidines. 

 Seminula argeutia. 



Of the 30 genera of the Upper Red Wall tabulated above, 32 are repre- 

 sented in the fossils of the Kansas Coal Measures, and of the 32 species 

 identified 2G are identical. The tabulated comparison, therefore, deter- 

 mines the age of the Tapper Red Wall of Arizona to be practically the 

 same as that of the Kansas Coal Measures. 



Note. — The species and genera marketl C ' were taken from Bulletin 211 of the U. S. 

 Geological Survey. Some of the other Kansas species (not marked) were taken from Dr. 

 Beede's Report, Kansas I'niversity Science Bulletin, Vol. I, No. 7, September, 1902. 



