‘The re-examination of Pitys primaeva and P. antiqua in the light of the structure exhibited by numerous specimens of a new species recently discovered in Haddingtonshire has shown that all three types are similar as regards the structure of the primary wood. In each case the primary cylinder is comparable with that in Archaeopitys Eastmanii [see p. 290], i.e., there are medullary as well as circummedullary xylem-strands. In certain specimens of the new species, Pitys Dayii, the bark and leaves are preserved and thus the details of leaf-trace emission from the stem have been determined. The leaves are short and stout and taper gradually to a point, quite distinct from the long, thin, spatulate Cordaitean foliage. The internal structure of the leaf renders it easily distinguishable from the Cordaites type while it tends to accentuate the possible relationship of Pitys with the Lyginodendreae.’