New species of crinoids from Illinois and other states.

Each plate accompanied by leaf of descriptive letterpress.

New species of palaeozoic invertebrates from Illinois and other states.

Each plate accompanied by leaf of descriptive letterpress.

Upper Devonian and Niagara crinoids.

Each plate accompanied by leaf of descriptive letterpress.

Description of new species of palæozoic Echinodermata /

Mode of access: Internet.