DIY History | Transcribe | Scholarship at Iowa | Coal Measures and Coal Mining in Iowa, including paleontology and a discussion on the coal formation; also the methods of mining by Russell T. Hartman, 1898 | Coal Measures and Coal Mining in Iowa by Russell T. Hartman, 1898, Page 160

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Coal Measures and Coal Mining in Iowa, including paleontology and a discussion on the coal formation; also the methods of mining by Russell T. Hartman, 1898

Coal Measures and Coal Mining in Iowa by Russell T. Hartman, 1898, Page 160

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[page]159[/page] becoming obscure at the middle; columella tortuous, curving outward to connect with the outer lip at the base of aperture. Size of adult specimen: length one and six-tenths inches breadth one-half inch, length of aperture one-half inch breadth of aperture three-tenth inch. Geol. Pos. -- Coal Measures. Localities. -- In Indiana and Illinois. Reference. -- Geol. of Illinois, Vol. II., p.875.