166 KANSAS UNIVERSITY SCIENCE BULLETIN. 



Polypora nodocarinata Ulrich. 



Septopora pinnata Ulrich. 



AmbocoMa planoconvexa (Shumard) Hall and Clarke. 



Chonetes granulifer Owen. 



Crania modesta White ? 



Derbya crassa (Meek and Hayden) Waagen. 



Derbya keokuk ( Hall and Clarke) . 



Dlelasma bovidens (Morton) White. 



Entelctes hemiplicata (Hall) Hall and Clarke. 



Meekella striaticostata (Cox) White and St. John. 



Productus cora d'Orbigny. 



Productus costatus Sowerby ? de Koninck. 



Productus longispinus Sowerby. 



Productus nebraskensis Owen. 



Productus pertenuis Meek. 



Productus punctatus (Martin) Morton. 



Productus scmireticulatus (Martin) d'Orbigny. 



Pugnax utah (Marcou) Hall and Clarke. 



Reticularia perplexa ( McChesney ) Schuchert. 



Seminula argintia ( Shepard ) Hall and Clarke. 



Spirifer cameratus Morton. 



Spiriferina cristata (Schlotheim) Dawson. 



Allorisma granosum (Shumard) Keyes. 



Allorisma subcuneatum Meek and Hayden. 



Aviculopecten occidentalis (Shumard) Meek and Hayden. 



Aviculopecten sp. 



Entolium aviculatum (Swallow) Meek. 



Myalina kansasensis Shumard? 



Myalina swallowi McChesney. 



Pinna peracuta Shumard. 



Pinna subspatulata Worthen ? 



Belleroplion crassus Meek and Worthen. 



Trachydomia wheeleri (Swallow) Keyes. 



Pleurotomaria tabulata Hall. 



Conularia crustula White ? (Very large for this species.) 



24. Calhoun Shales. This formation is fifty to sixty-five 

 feet in thickness. The lower part is a layer of soft argillaceous 

 sandstone from twelve to twenty feet thick. The upper portion 

 of the formation is a bluish shale, arenaceous below, clayey 

 above, and of comparatively fine texture. No fossils have been 



