Plate XXIII: Devonian gastropods

Figure Number Modern genus and species 1889 Genus and species Phyllum or Class Age, etc.
1-6, 12 same as 1889 Platyceras dumosum Conrad 1840 gastropod Devonian
7, 8 ? Platyceras dumosum var. rarispinum Hall 1861 gastropod Devonian
9, 11 same as 1889 Platyceras bucculentum Hall 1861 gastropod Devonian
10 same as 1889 Platyceras symmetricum Hall 1861 gastropod Devonian

 

 

 

 

Last Modified on 2019-02-05
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