132 THE ROYAL SOCIETY OF CANADA 
and appears to have been plants of upland habit, like the corres- 
ponding species of the Pennsylvania—New York Hamilton strata. 
The plants of the Upper Devonian of Gaspé though few in the 
number of species are of characteristic genera. Here beside the wide- 
spread Psilophyton princeps, Dn., we find two species of Archeopteris, 
the first of which A. Jacksoni, Dn., is a typical form of the genus, and 
it is accomplished by the nearly related A. Gaspiensis, Dn. These, 
judging from the way the species of this genus are distributed in Penn- 
sylvania and in Europe, are to be considered as upland species, and 
here as elsewhere the genus Archæopteris is characteristic of Upper 
Devonian strata. 
The Devonian of Great Britain. 
Crossing the Atlantic we again met with a Devonian flora in the 
West and North of the British Isles. The books at my command do 
not enable me to investigate this flora as fully as I could wish, but the 
following notes will show what its elements are. 
A paper by R. Etheridge Jnr., and R. L. Jack on the Devonian 
plants of Calender in Scotland (1877) gives a synopsis of the studies 
up to that date on the Devonian plants of Scotland. The following are 
the species, namely Lycopodites Milleri (according to Dawson this is a 
herbaceous species). Lepidodendron nothum, Salt. (non Unger). Daw- 
son says that this is near his L. Gaspianum; Stigmaria, fide Dawson 
Psilophyton princeps fide Dawson Ps.—robustius, recognized by Daw- 
son Cyclopteris (Pycnophyllum) Brown f. Dawson Asterocalamites 
scrobiculatus (Cal. transitionis Dn) Anarthrocanna fide Dawson. 
The prominent plants in this group are upland plants, as Lepi- 
dodendra and Psilophyton. 
Only a few plants are described in the Catalogue of the British 
Museum by Mr. Kidston, Psilophyton Dechenianum, Cyclostigma Kil- 
torkense and Paleopteris Hibernica. The two latter species are referred 
to the Upper Devonian and of these the last shows the presence of the 
characteristic genus Archeopteris 
A later essay by the late Mr. J. G. Goodchild (1896) “On Desert 
conditions in Britain’”’* bears on the subject of the Devonian Flora. 
From this list we also gather the impression of somewhat varied eco- 
logical conditions. His list is as follows:— 
*Trans. Edinb. Geol. Soc. Vol. VII (1899) p. 219. 
