Note on the occurrence of a seed-like fructification in certain palæozoic lycopods

It has generally been assumed by palseobotanists that the fossil seeds described by Williamson under the name ofCardiocarpus even if not necessarily co-generic with theCardiocarpus of Brongniart, at least belonged to the same group of Gymnospermous plants. Brongniart’s specimens, often preserved with marvellous perfection, have proved to be the seeds of members of the extinct Order Cordaitese, or of allied plants. The same conclusion applies to certain of the British forms, notably theCardiocarpon anomalum of Carruthers, which was certainly Cordaitean, and probably to some of Williamson’s examples.