DESCRIPTIONS OF SPECIES. 439 



SEDGWICKIA McCoy, 18M. 

 Sedgwickia topekensis Shumard? 



1858. Leptodomus topekaenm. Shumard, Acad. Sci. St. Louis, Trans., vol. 1, p. 208. 



Coal Measures: Missouri River bluffs, a short distance below mouth of Kansas Kiver. 

 1864. SedgvAckiatopekaensis? Meek and Hayden, Smithsonian Cont. Knowledge, vol. 14, No. 172, p. 40, 

 figs. A, B. 



Coal Measures: Leavenworth City, Kans. 

 1891. Sedgwickia topekaensis. AVhite, U. S. Geol. Surv., Bull. No. 77, p. 26, pi. 4, fig. 11. 



Permian: Goodwin Creek, Baylor County, Tex. 



1 895. AUorisma iopekaeiisis. Keyes, Missouri Geol. Surv. , vol. 5, p. 128. ( Date of imprint, 1894. ) 

 Upper Coal Measures: Kansas City, Mo. 



1900. Sedgxrickia iopekaensis. Beede, Univ. Geol. Surv. Kansas, Kept., vol. 6, p. 171, pi. 20, fig. 3. 

 Upper Coal Measures: Topeka, Kans. 



Two poorly preserved specimens from the mouth of Marguerite Creek (station 

 2345) seem to belong to this species. They resemble very closely, as far as their 

 characters are shown, the specimen figured by Meek and Hayden as belonging to 

 Shumard's species. 



Locality and horizon. — San Juan region (station 2345); Rico formation. 



SCITIZODUS King, 1844. 

 ScHizoDus cuNEATUs Meek? 



PI. 9, fig. 10. 



1875. Schizodus emieatus. Meek, Pal. Ohio, vol. 2, p. 336, pi. 20, fig. 7. 



Lower Coal Measures: Putnam Hill and Flint Ridge, Ohio. , . 



1886. Schizodus cuneatusf Heilprin, 2d Geol. Surv. Pennsylvania, Ann. Rept. for 1885, p. 456, fig. 9a, 

 p. 442, fig. 9. 



Upper Coal Measures: Mill Creek limestone, Wilkesbarre, Pa. 



1886. Schizodus cuneatiis? Heilprin, Proc. and Coll. Wyoming Hist, and Geol. Soc, vol. 2, pt. 2, p. 



275, fig. 9. 

 Upper Coal Measures: Mill Creek limestone, Wilkesbarre, Pa. 



1887. Schizodus cuneatus {?). Herrick, Sci. Lab. Denison Univ., Bull., vol. 2, p. 42, pi. 4, fig. 2.S. 

 Coal Measures: Flint Ridge, Ohio. 



1896. Schizodus cuneatus. Smith, Leland Stanford Junior Univ. Publ.; Cont. Biol. Hopkins Seaside 



Lab., No. 9, p. 35. 

 Upper Coal Measures: Crawford County, Ark. 

 Lower Coal Measures: Conway County, Ark. 

 1896. Schizodus cuneatus. Smith, Am. Phil. Soc, Proc, vol. 35, p. 245. 

 Upper Coal Measures: Crawford County, Ark. 

 Lower Coal Measures: Conway County, Ark. 



This species has been found at three localities and seems not to be rare. It is a 

 large shell and closely resembles Meek's type in its shape. The latter, however, is 



