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 161

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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 161

[page]160.[/page]
[underlined][underlined][underlined][underlined]CEPHALOPODA[/underlined][/underlined][/underlined][/underlined]

     This class includes bi-laterally symmetrical mollusks, with large heads, and having their bodies enclosed in muscular mantles. The fore part of the foot is divided into eight or more tentacles or arms which are situated about the mouth. The epipodia are well developed and by joining form a muscular tube through which the waste water is discharged from the respiratory organs. One or two pairs of gills are present.

[underlined][underlined][underlined]TETRABRANCHIATA.[/underlined][/underlined][/underlined]

     The members of this order have a many-chambered external shell; the last and largest chamber contains the body proper of the animal. The chambers are partitioned from one another by transverse walls or septa which are perforated by a tube called the [?siphuncle?]. The tentacles

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[page]160.[/page] [underlined][underlined][underlined][underlined]CEPHALOPODA[/underlined][/underlined][/underlined][/underlined] This class includes bi-laterally symmetrical mollusks, with large heads, and having their bodies enclosed in muscular mantles. The fore part of the foot is divided into eight or more tentacles or arms which are situated about the mouth. The epipodia are well developed and by joining form a muscular tube through which the waste water is discharged from the respiratory organs. One or two pairs of gills are present. [underlined][underlined][underlined]TETRABRANCHIATA.[/underlined][/underlined][/underlined] The members of this order have a many-chambered external shell; the last and largest chamber contains the body proper of the animal. The chambers are partitioned from one another by transverse walls or septa which are perforated by a tube called the [?siphuncle?]. The tentacles