_Spiriferina cristata_ (Schlotheim) Dawson. _Allorisma granosum_ (Shumard) Keyes. _Allorisma subcuneatum_ Meek and Hayden. _Astartella vera_ Hall. _Aviculopecten occidentalis_ (Shumard) Meek and Hayden. _Entolium aviculatum_ (Swallow) Meek. _Limopteria marian_ (White) Beede? _Macrodon_ Cf. _tenuistriatus_ Meek and Worthen. _Macrodon_ sp. _Myalina swallowi_ McChesney. _Pinna peracuta_ Shumard. _Schizodus curtus_ Meek and Worthen. _Schizodus curtiformis_ Wolcott. _Schizodus rossicus_ de Verneuil. _Aclisina swalloviana_ (Geinitz) Meek, and other gastropods too poorly preserved to be identified. _Bellerophon carbonarius_ Cox. _Orthoceras_ sp. _Griffithides scitula_ (Meek and Worthen) Vogdes. =26.= SEVERY SHALES. These shales are blue below, varying through yellow to black in places above the coal. They are fifty to seventy-five feet in thickness. The texture varies, and in the upper part they contain the Osage coal, which is mined at Topeka, Burlingame, Osage City, and other places. In correlating isolated sections the rocks between the Topeka limestone and the Barclay (= Burlingame = Wyckoff, etc.) limestone have been somewhat confused. Under the title, “Stratigraphy of the Kansas Coal Measures,”[5] Haworth describes them as follows: “Above them (Topeka limestones) lies another shale bed fifty feet thick, at the top of which lies the Topeka coal, a seam about eleven inches thick, which has been mined in different places. The coal is immediately overlaid by two thin limestone beds, separated by less than three feet of shales. Above the limestone is the Osage City shale, more than 100 feet thick, at the top of which is the Osage coal, averaging eighteen or twenty inches thick.... Above the Osage coal is a thin limestone system [formation], superseded in turn by the Burlingame shales, a body about 150 feet thick in the vicinity of Burlingame, and possibly more in places. Both the Burlingame and Osage City shales extend for long distances to the southwest and northeast, and are important landmarks in stratigraphy.” Bennett[6] describes the succession at Topeka correctly, but supposes the coal above the Topeka coal corresponds to the Osage horizon, instead of to the one already indicated in this paper as its equivalent. Haworth’s statement in Vol. I, p. 162, of the Kansas Survey, is practically a repetition of the one just quoted, but he corrects the correlation of the coals in a foot-note at the bottom of page 161. In volume III of the same reports (p. 94) he uses the term “Osage shales” for all the shales between the Topeka limestone and the Barclay limestone. The section is correctly given by Hall in his “Section from Boicourt to Alma,”[7] though it is not clear just what is meant by his “Osage City Shales, Coal, and Limestone.”