Dawson, J. W. (1881). Palaeontological notes. I. A new species of Piloceras. II. 2. Saccamina? (Calcisphaera) Eriana (an Erian rhizopod of uncertain affinities). III. New Devonian plants from the Bay de Chaleur. The Canadian Naturalist and Quarterly Journal of Science, new series. 10: 1-11.
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Dawson, J. W.
1881
Palaeontological notes. I. A new species of Piloceras. II. 2. Saccamina? (Calcisphaera) Eriana (an Erian rhizopod of uncertain affinities). III. New Devonian plants from the Bay de Chaleur
The Canadian Naturalist and Quarterly Journal of Science, new series