Mansfield W.C., — Some peculiar fossil forms from Maryland
Sovraccoperta
1927. In 8vo, original wrappers, pp. 16 with 3 pls. Peco, US Natnl. Mus., 71(16). The description of the mysterious ichnogenus Xenohelix (= Gyrolithes) originally retained to be a mollusc but maybe connected to a capitellid polychaetes.
Machine translation by Google. The original description of the seller is leading.
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Numero libro:
71460
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