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 147

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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 147

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[page]146.[/page] form; lip strongly thickened naer the umbilicus, thinner toward the middle, spreading over preceeding volutions as a thick callous. Surface marked by lines of growth and by irregular wrinkles or undulations. Geol. Pos.-- Coal Measures. Loc.-- Oskaloosa, Iowa; Kansas City, Missouri. Ref.-- Geol of Missouri, Vol. V., page 151. [underlined]Bellerophon pericarinatus[/underlined], Conrad. Plate XI. figure 10. Conrad, 1842, Jour. Acad. Nat. Sci. Philadelphia, Vol. VIII., page 268. Shell about medium size, sub-globose, broadly expanded near the aperture; umbilicus closed by the expansion of the last volution; outer lip thickened at the sides, thin at the middle; inner lip forming a thick callous over inner volutions;