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 114

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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 114

[page]113.[/page]

[underlined][underlined][underlined][underlined][underlined]MOLLUSCA.[/underlined][/underlined][/underlined][/underlined][/underlined]

     This sub-kingdom is made up of soft bodied, bilaterally symmetrical, not definitely segmented animals. The front of the animal is generally developed into a distinct head which bears tentacles. The mouth is anterior; the alimentary canal is entirely separate from the general body cavity; the anus is primitively posterior, but in many forms it may be found farther forward. The venous system consists of a small number of paired ganglia. There is present a vascular system and a heart, consisting of a ventricle adn one or two auricles. A single kidney or one or more pairs of kidneys, are present as saccular organs, which open internally into the body cavity, and communicate with the exterior

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[page]113.[/page] [underlined][underlined][underlined][underlined][underlined]MOLLUSCA.[/underlined][/underlined][/underlined][/underlined][/underlined] This sub-kingdom is made up of soft bodied, bilaterally symmetrical, not definitely segmented animals. The front of the animal is generally developed into a distinct head which bears tentacles. The mouth is anterior; the alimentary canal is entirely separate from the general body cavity; the anus is primitively posterior, but in many forms it may be found farther forward. The venous system consists of a small number of paired ganglia. There is present a vascular system and a heart, consisting of a ventricle adn one or two auricles. A single kidney or one or more pairs of kidneys, are present as saccular organs, which open internally into the body cavity, and communicate with the exterior