We have no palms in the Canadian or Scottish Palæocene, though I believe they are found further south. The dicotyledonous trees are richly represented. Perhaps the most conspicuous were three species of _Platanus_, the leaves of which sometimes fill the sandstones, and one of which, _P. nobilis_, Newberry, sometimes attains the gigantic size of a foot or more in diameter of its blade. The hazels are represented by a large-leaved species, _C. Macquarrii_, and by leaves not distinguishable from those of the modern American species, _C. Americana_ and _C. rostrata_. There are also chestnuts and oaks. But the poplars and willows are specially abundant, being represented by no less than six species, and it would seem that all the modern types of poplar, as indicated by the forms and venation of the leaves, existed already in the Laramie, and most of them even in the Upper Cretaceous. _Sassafras_ is represented by two species, and the beautiful group of _Viburnum_,, to which the modern tree-cranberry belongs, has several fine species, of some of which both leaves and berries have been found. The hickories and butternuts are also present, the horse-chestnut, the _Catalpa_ and _Sapindus_, and some curious leaves which seem to indicate the presence of the modern genus _Symphorocarpus_, the snow-berry tribe. The above may suffice to give an idea of the flora of the older Eocene in North America, and I may refer for details to the works of Newberry, Lesquereux, and Ward, already cited. I must now add that the so-called Miocene of Atanekerdluk, Greenland, is really of the same age, as also the "Miocene" of Mull, in Scotland, of Antrim, in Ireland, and of Bovey Tracey, in the south of England, and the Gelinden, or "Heersian" beds, of Belgium, described by Saporta. In comparing the American specimens with the descriptions given by Gardner of the leaf-beds at Ardtown, in Mull, we find, as already stated, _Onoclea sensibilis_, common to both. The species of _Sequoia_, _Gingko_, _Taxus_, and _Glyptostrobus_ are also identical or closely allied, and so are many of the dicotyledonous leaves. For example, _Platanoides Hebridicus_ is very near to _P. nobilis_, and _Corylus Macquarrii_ is common to both formations, as well as _Populus Arctica_ and _P. Richardsoni_. I may add that ever since 1875-'76, when I first studied the Laramie plants, I have maintained their identity with those of the Fort Union group of the United States, and of the so-called Miocene of McKenzie River and Greenland, and that the whole are Paleocene; and this conclusion has now been confirmed by the researches of Gardner in England, and by the discovery of true Lower Miocene beds in the Canadian northwest, overlying the Laramie or lignite series.