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 135

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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 135

[page]134.[/page]

[underlined][underlined]Grammysiidae.[/underlined][/underlined]

[underlined]Edmondia nebrascensis[/underlined], Geinitz, sp.
Plate X. figure 7.

Astarte nebrascensis, Geinitz, 1866, Carb. and Dyas in Nebraska, p.16.
     Referred to genus Edmondia by Meek in 1868, see Final Rept. U. S. Geol. Sur. Nebraska, p. 214.
     Shell ovate or elliptical, not very large, length greater than height by about one-half. Shell convex umbos rounded passing more abruptly to anterior than to posterior margin; beaks incurved anterior to middle. Hinge margin nearly or quite straight, making an angle with the slightly curved posterior margin; basal margin semi-elliptical; anterior margin curving slowly around to hinge line. Surface marked by rather prominent, sharp, concentric ridges separated by broad rounded furrows.

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[page]134.[/page] [underlined][underlined]Grammysiidae.[/underlined][/underlined] [underlined]Edmondia nebrascensis[/underlined], Geinitz, sp. Plate X. figure 7. Astarte nebrascensis, Geinitz, 1866, Carb. and Dyas in Nebraska, p.16. Referred to genus Edmondia by Meek in 1868, see Final Rept. U. S. Geol. Sur. Nebraska, p. 214. Shell ovate or elliptical, not very large, length greater than height by about one-half. Shell convex umbos rounded passing more abruptly to anterior than to posterior margin; beaks incurved anterior to middle. Hinge margin nearly or quite straight, making an angle with the slightly curved posterior margin; basal margin semi-elliptical; anterior margin curving slowly around to hinge line. Surface marked by rather prominent, sharp, concentric ridges separated by broad rounded furrows.