Contributions to the palaeontology of Illinois and other western states

F. B. Meek, and A. H. Worthen

1867

Article

Proceedings of the Academy of Natural Sciences of Philadelphia 1865:251-274

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Taxa discussed in this work:

• Anomphalus rotalus
• Anomphalus rotulus
• Ianthinopsis chrysalis
• Microdoma
• Microdoma conicum
• Naticopsis genevievensis
• Orthonema conica
• Orthonychia chesterense