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 138

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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 138

[page]137.[/page]

[underlined][underlined][underlined][underlined]BRANCHIOGASTROPODA[/underlined][/underlined][/underlined][/underlined]

[underlined][underlined][underlined]PROSOBRANCHIATA.[/underlined][/underlined][/underlined]

     In this order the gills are placed in front of the heart and the auricle in front of the ventricle. Siphon-ostomatous or holostomatous.

[underlined][underlined]Pleutomariidae.[/underlined][/underlined]

     Shell nacreous, variable in form, but usually coiled into a flat or an elevated spiral.

[underlined]Pleurotomaria carbonaria[/underlined], Norwood and Pratten.
Plate XI. figure 1.
M. and P., 1855; Jour. Acad. Nat. Sci. Philadelphia, Vol. III. page 75.
Pleurotomaria harii, Miller, 1891, Geol. Survey of Indiana, 17th Annual Report.
     Shell medium size, subglobose, height less than diameter; whorls five or six, rounded, first whorl or volution very small, last one forming the major portion of the shell; suture rather

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[page]137.[/page] [underlined][underlined][underlined][underlined]BRANCHIOGASTROPODA[/underlined][/underlined][/underlined][/underlined] [underlined][underlined][underlined]PROSOBRANCHIATA.[/underlined][/underlined][/underlined] In this order the gills are placed in front of the heart and the auricle in front of the ventricle. Siphon-ostomatous or holostomatous. [underlined][underlined]Pleutomariidae.[/underlined][/underlined] Shell nacreous, variable in form, but usually coiled into a flat or an elevated spiral. [underlined]Pleurotomaria carbonaria[/underlined], Norwood and Pratten. Plate XI. figure 1. M. and P., 1855; Jour. Acad. Nat. Sci. Philadelphia, Vol. III. page 75. Pleurotomaria harii, Miller, 1891, Geol. Survey of Indiana, 17th Annual Report. Shell medium size, subglobose, height less than diameter; whorls five or six, rounded, first whorl or volution very small, last one forming the major portion of the shell; suture rather