XVII.—On the Fossil Osmundaceæ

Abstract

The fossils dealt with in this part of our memoir should have been included in the first paper of the series had it been possible to treat the plants described in the order of the complexity of their structure. Unfortunately, however, the specimens did not reach our hands until Part I. was already published; and since we were no longer able to place them in their proper position in the sequence already embarked upon, it was decided to defer their treatment until the conclusion of the memoir.