146 



KANSAS UNIVERSITY SCIENCE BULLETIN. 



tion takes place through great lengths of time, we should 

 expect to find faunal changes very gradual, especially in a 

 nearly isolated epicontinental sea, though it be of great di- 

 mensions. 



There seems to be little reason, therefore, for considering 

 all sediments laid down in unbroken succession in a given 

 region as belonging to the same period, because the faunal 

 changes, like the stratigraphic changes, are gradual. It is 

 unnecessary to point out here striking and well-known ex- 

 amples of such occurrences. 



Aside from the fossils given in the tables, Doctor Gould has 

 forwarded me several specimens of dolomite with Pleuropho- 

 rus sp., and Schizodus sp., the latter very similar to one of 

 those described later. These are not sufficiently well pre- 

 served to be identified with certainty and are omitted. 



Species. 



Enid- 

 Wichita. 



White- 

 horse. 



Quarter- 

 master. 



Paralegoceras baylorensis ( White) 



Waagenoceras cumminsi White 



Medlicottia copei White 



Popanoceras walcotti White 



Orthoceras rushensis McChesney ? 



Temnocheilus winslowi ( Meek and Worthen) . 



Tainoceras occidentaHs ( Swallow) 



Nautilus ? 



? 



( Endoiobus) Y. .. '."...... .... '. '. 



Strophostylus remex ( White) 



Naticopsis shumardi McChesney? 



Euomphalus subquadratus Meek and Worthen 

 ? 



Murchisonia ? , 



Lepetopsis ? ? - 



Bellerophon crassus Meek and Worthen 



Patellostium montfortianum Norw. and Pratt, 



Bellerophon ? 



Sedgwickia topekaensis ( Shumard) 



Pleurophorus ? 



Modiola subelliptica Meek 



Yoldia subscitula Meek and Worthen 



Myalina permiana Swallow 



aviculoides Meek and Hayden 



perattenuata Meek and Hayden 



Pteria longa ( Geinitz) 



Aviculopecten occidentalis Shumard 



Syringopora ? 



Spirorbis ? 



Estheria ? minuta Jones ? 



Cythere nebrascensis Geinitz 



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