166 Canadian Record of Science. 
of Silurian strata; and (3) the Silurian system of Northern 
New Brunswick, Maine and Southern Quebec. Comparisons 
are instituted between the rocks of Lake Temiscouata, in 
the last named province, and those of Aroostook County, 
Maine, and large areas of the latter, regarded in the Maine 
reports as Devonian, are shown to be Silurian. Attempts 
are, at the same time, made to establish more clearly the 
equivalency of different portions of the Silurian system, and 
lists of fossils are given, indicating horizons ranging from 
the Medina and Clinton to the Lower Helderberg forma- 
tions,” 
On Nematophyton and Allied Forms from the Devonian (Erian) 
of Gaspé and Baie des Chaleurs.** 
By D. P. Pennaiow, B.Sc., with IntRopuctory GHoLocicaL Note By 
Sir Witt1am Dawson, F.R.S., re. 
“The paper stated the facts relating to the original dis- 
covery of these plants by Sir William Logan, their geo- 
logical relations, and the original description of the speci- 
mens, with notices of recent exhaustive microscopic exam- 
inations of the original specimens and slides recently pre- 
pared, and comparisons of these curious plants with allied 
forms and associated remains of plants. It would appear 
that these remarkable trees, while evidently plants of the 
land, though growing in swamps or on the borders of the 
sea, have structures not now found in arboreal plants, but 
rather resembling those of algee and lichens. It was 
pointed out that this is parallel to the fact seen in the giant 
Lycopods and Equisetums of the Carboniferous, that ancient 
forms of vegetation, with few kinds of tissue, emulated the 
size and complexity of modern Exogens. Nematophyton 
seemed to be a survival to the time of the Lower Devonian, 
of a type of tree peculiar, with others akin to it, to the 
oldest ages of the earth’s history. The paper discussed the 
question as to the probable connection of this plant with 
the strange seeds or spore-cases named Pachytheca, by 
