Paleontology of the Eureka District
Paleontology of the Eureka District
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(M. ) Eicliardsoni Meek, from, the Devonian of British America, is closely allied to the Lone Mountain shell having numerous radiating plications.
From these comparisons it appears that S. (M. ) undifera is the type of a widely distributed and very variable species. Among the American varie- FOSSILS OF THE DEVONIAN. 145 ties we place S. (M. ) fimbriata Conrad, S. (M. ) subundifera M. & W. , (M. ) compacta Meek, and the Nevada shell under consideration.
S. (M. ) undifera and curvatus, var. Undul...ata, Roemer, of the Middle De- vonian of England and the continent of Europe, S. (M. ) erubescens Eichwald (Leth. Ross. , p. 703, taf. 34, fig. 18), S. {M. } undifera, var. Takwanensis, Kayser, from the Devonian of China, and S. (M. ) undifera Ethridge, from Queensland, all appear to belong to the same specific group and show its wide geographic distribution.
It may be more convenient to use the older name S. (M. } fimbriata Conrad for the variety with the strong interrupted striae, as it occurs in the Lower Devonian of New York and the Upper Mississippi Valley region, and Roemer's name S.
What to read after Paleontology of the Eureka District?
You can find similar books in the "Read Also" column, or choose other free books by Charles D Charles Doolittle Walcott to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
(M. ) Eicliardsoni Meek, from, the Devonian of British America, is closely allied to the Lone Mountain shell having numerous radiating plications.
From these comparisons it appears that S. (M. ) undifera is the type of a widely distributed and very variable species. Among the American varie- FOSSILS OF THE DEVONIAN. 145 ties we place S. (M. ) fimbriata Conrad, S. (M. ) subundifera M. & W. , (M. ) compacta Meek, and the Nevada shell under consideration.
S. (M. ) undifera and curvatus, var. Undul...ata, Roemer, of the Middle De- vonian of England and the continent of Europe, S. (M. ) erubescens Eichwald (Leth. Ross. , p. 703, taf. 34, fig. 18), S. {M. } undifera, var. Takwanensis, Kayser, from the Devonian of China, and S. (M. ) undifera Ethridge, from Queensland, all appear to belong to the same specific group and show its wide geographic distribution.
It may be more convenient to use the older name S. (M. } fimbriata Conrad for the variety with the strong interrupted striae, as it occurs in the Lower Devonian of New York and the Upper Mississippi Valley region, and Roemer's name S.
What to read after Paleontology of the Eureka District?
You can find similar books in the "Read Also" column, or choose other free books by Charles D Charles Doolittle Walcott to read onlineMoreLess
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