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 162

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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 162

[page]161.[/page]

are not provided with suckers.

[underlined][underlined][underlined]NAUTILOIDEA.[/underlined][/underlined][/underlined]

     In this sub-order the shell may be straight, bent, or spirally coiled, the aperture may be simple or may be contracted, the ventral side is usually indicated by the aperature being emarinate on that side. Usually the sutures are simple and the septa concave toward the body.

[underlined][underlined]Orthoceratidae.[/underlined][/underlined]

     In this family the shell is never more than slightly curved, the aperture is simple the siphuncle is slender and cylindrical.

[underlined]Orthoceras rushensis[/underlined], McChesney.
Plate XII figure 1.
McChesney, 1860, New Paleozoic Fossils, p.68.
Orthoceras harii, Miller, 1891, Geology of Indiana, 17th Ann. Rept. p.87.
     Shell small, slender, of circular section;

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[page]161.[/page] are not provided with suckers. [underlined][underlined][underlined]NAUTILOIDEA.[/underlined][/underlined][/underlined] In this sub-order the shell may be straight, bent, or spirally coiled, the aperture may be simple or may be contracted, the ventral side is usually indicated by the aperature being emarinate on that side. Usually the sutures are simple and the septa concave toward the body. [underlined][underlined]Orthoceratidae.[/underlined][/underlined] In this family the shell is never more than slightly curved, the aperture is simple the siphuncle is slender and cylindrical. [underlined]Orthoceras rushensis[/underlined], McChesney. Plate XII figure 1. McChesney, 1860, New Paleozoic Fossils, p.68. Orthoceras harii, Miller, 1891, Geology of Indiana, 17th Ann. Rept. p.87. Shell small, slender, of circular section;