The attention of the Society was called to many beautiful specimens of Sphenopteris laid on the table. These had been obtained by Dr Duns and his predecessor, Dr Fleming, from the old workings in the Burdiehouse limestones, near Edinburgh, well known from Hibbert's Memoir (1835), and from the papers of more recent observers. The species exhibited were chiefly S. artemisiæfolia and S. affinis. An Antholite (A. Pitcairniœ) was also shown, in which the pedicels that spring from the flower-like buds in the axils of the bracts, sub-opposite in the spike, are well represented. The author then referred to Cardiocarpon, Brong., and to the species named by Brongniart, Lindley, and Hutton, and more recently by Dawson and Lesquereux. It was pointed out, that very many Cardiocarpa occur in association with the specimens of Sphenopteris on the table.