170 KANSAS UNIVERSITY SCIENCE BULLETIN. 



traced from a few miles below Eureka to Cedar valley, forming 

 a line from two to five miles west of the Elk Falls escarpment. 

 This shale bed is therefore sufficiently prominent to be recog- 

 nized in the field, and to be of considerable local and stratigraphic 

 importance. The town of Severy lies within it, and therefore 

 it may be called the Severy shales."' Dr. George I. Adams, 

 of the United States Geological Survey, under whose direction 

 the work of correlating the Coal Measures rocks of Kansas was 

 •done last summer, informs me that the names used in this paper 

 and accredited to him have been passed upon by the committee 

 on nomenclature, and he has kindly permitted me to use them in 

 advance. 



So far as known these shales are not fossiliferous, save for a 

 few fragments of fern leaves, below the coal,, but are very fos- 

 siliferous locally just above it. 



Lophophyllum profundum ( Milne-Edwards and Haime) Foerste. 



Ceriocrinus craigi (Worthen) Wachsmuth and Springer. 



■Ceriocrinus harshbargeri Beede. 



Ceriocrimis hemispheric us (Shumard) Wachsmuth and Springer. 

 These three species of crinoids are from the dump, and may be 

 from the shales between the two layers of the Howard limestone 

 above. 



Spirorbis sp. 



Fenestella dentata Rogers. 



Fenestella limbata Foerste. 



Fenestella mimica Ulrich. 



Pinnoiopora elliptica Rogers. 



Polypora whitei Foerste. 



Amboccclia planoconve.va (Shumard) Hall and Clarke. 



Chonetes glaber Geinitz. 



Chonetes grannlifer Owen. 



Derbya crassa (Meek and Hayden) Waagen. 



Dielasma bovidens (Morton) White. 



Hustedia mormoni (Marcou) Hall and Clarke. 



Lingula umbonata Cox. If this species is considered separate 

 from L. mytiloides, the specimens here referred to would prob- 

 ably be classed with the latter. 



Productvs cora d'Orbigny. 



Prodiictus longispinus Sowerby. 



Productus nebraskensis Owen. 



