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 117

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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 117

[page]116.[/page]

muscles eccentric.

[underlined]Aviculopicten occidentalis[/underlined]
Plate IX. figure 1.

[?Pecten?] occidentalia, [?Shumard?], 1855, Missouri Rept. p.207. (not Winchell).
Pecten clevelandiens, Swallow; 1858, Trans. Saint Louis. Acad. Sci. Vol. I. page 184.
Aviculopecten occidentalis, Meek and Worthen, 1866, Geol. Rept., Illinois, Vol. II. p.331.
Picten missouriensis, Geinitz, 1866, Carb. and Dyas in Nebraska, p. 35.
     Shell rather small, not equivalve, subovate exclusive of the ears; margin regularly curved; hing [?hinge?] line nearly or quite equal to greatest length of shell.
     Left valve convex, with ears sub-equal; anterior ear with radiating costae, more convex but not so long nor so acute as teh posterior ear but more distinctly defined from umbonal slope; radiating costae sometimes

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[page]116.[/page] muscles eccentric. [underlined]Aviculopicten occidentalis[/underlined] Plate IX. figure 1. [?Pecten?] occidentalia, [?Shumard?], 1855, Missouri Rept. p.207. (not Winchell). Pecten clevelandiens, Swallow; 1858, Trans. Saint Louis. Acad. Sci. Vol. I. page 184. Aviculopecten occidentalis, Meek and Worthen, 1866, Geol. Rept., Illinois, Vol. II. p.331. Picten missouriensis, Geinitz, 1866, Carb. and Dyas in Nebraska, p. 35. Shell rather small, not equivalve, subovate exclusive of the ears; margin regularly curved; hing [?hinge?] line nearly or quite equal to greatest length of shell. Left valve convex, with ears sub-equal; anterior ear with radiating costae, more convex but not so long nor so acute as teh posterior ear but more distinctly defined from umbonal slope; radiating costae sometimes