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 83

Transcribe
Translate

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 83

Saving...

[page]82.[/page] Productus In this genus of the Productidae, the pedicle is either absent or is a functionless rudiment; the shell, probably, being anchored by the spines of the ventral surface. The shell is concavo-convex, rarely plano-convex, the cardinal areas, teeth, and sockets if not entirely absent are mere rudiments. [underlined]Productus costatus[/underlined], Sowerby, Plate VI. figure 5. Producta costata, Sowerby, 1827, [?Min.?] Conch., Pl. 560, Vol. VI., p115. Productus costellata, McCoy, 1844, Synopsis Carb. Fossils Ireland. p.108. Productus costatus, de Verneuil, 1845, Geol. Russia et Ural Mts. Vol. II, p.268 Productus portlockianus, Norwood and Pratten, 1854, Journ. Acad. Nat. Sci. Philadelphia, page 15.