The plants described in this paper were collected by Mr. E. J. Wayland, Government Geologist of Uganda, in the course of a mineral survey of Ceylon: they are the first fossil plants recorded from the island. Several small though well-defined impressions of plants were discovered at Tabbowa in the North-West Province (lat. 8° S., long. 80° E.) in a pale-yellow shale resting ‘directly on Archæan rocks and folded in with them.’ In writing to Dr. A. Morley Davies, from whom we received the collection, Mr. Wayland speaks of the discovery of the plant-beds as the result of ‘the most arduous work’ that he has ever done:— ‘dense jungle and lateritic earth masked exposures, and mosquitoes were dreadful. The monsoon was late, and one by one men fell sick, and the day came when all the men (and headman) were down. Then, after doctoring them to the best of my ability, I proceeded to carry on the work alone, cutting my own path through the jungle and doing everything myself.’ The results obtained by Mr. Wayland are of considerable importance from a phytogeographical and a stratigraphical point of view. PTERIDOPHYTA: Filicales. Fam.? Osmundaceæ. Cladophlebis reversa (Feistmantel) [=?Todites Williamsoni (Brongniart)]. (Pl. XII, figs. 13, 15 a , 15 b , & 16). The three imperfect pinnae referred to this species are characterized by the relatively broad axis and the Cladophlebis type of venation. The venation is most clearly seen in fig. 15 b , which represents a crushed fragment with short and broadly rounded pinnules attached by