636 THE JOURNAL OF GEOLOGY. 
fessor Penhallow had previously found in material sent by Mr. 
Townsend from the Don Improvements, Asimina triloba, Ulmus 
racemosa, Taxus baccata and a new maple leaf, which was named 
Acer pleistocenicum.'. In respect to the woods, Professor Pen- 
hallow says that they are usually badly decayed, but that he has 
referred them to the nearest living species. 
If we compare the inter-glacial fossils of the Don with those 
of Scarboro’ we find them surprisingly different. Up to the pres- 
ent only one species ‘of animal, Spherium striatinum, a form 
having a wide range, has been shown to be common to both 
localities. It will be of great interest to learn if Dr. Scudder 
finds insects from the Convict Cutting the same as those from 
Scarboro’ or not. No two trees are undoubtedly alike, though 
Picea nigra of Scarboro’ is not far removed from Picea sitchensis 
of the Don; and willow leaves of undetermined species have 
been found in both places. 
It will be remembered that both the insects and plant remains 
of Scarboro’, in the opinion of such good authorities as Dr. Scud- 
der and Dr. Macoun, point to a cool climate like that of Lake 
Superior or Labrador; while the Don fossils, on the other hand, 
point equally conclusively to a climate as warm as that of Toronto 
at present, if not considerably warmer. The numerous unios, 
some of them no longer found in our lakes, though common far- 
ther south in the Mississippi drainage system ;* the forest trees 
including three species (Asimiana triloba, the osage orange and 
Fraxinus quadrangulata) now belonging to the portions of 
Ontario along Lake Erie and the states to the south,3 hint at a 
climate very far from glacial, probably comparable to that of 
Ohio at present. 
There seems no doubt also that both of these deposits are 
inter-glacial and included between the same sheets of till; though 
the lowest till is out of sight below the lake at Scarboro’. These 
two series of beds can hardly have been formed contempora- 
* Bull. Geol. Soc. Am., Vol. I., p. 328. 
?C. T. Simpson, Proceedings U. S. National Mus. Vol. XVI., pp. 591-5. 
3 Dr. MAcOoUuN, Forests of-Canada, Trans. Royal Soc. Can., Sec. IV., 1894, p. II. 
