[PHNHALi.ow] NOTES ON TERTIARY PLANTS 73 



plicable to ilie one as the other, and the only real difïcrence is in point 

 of size. It therefore seems probable that A. pleistocenicum is much 

 older than we formerly had reason to suppose, and that it has already 

 been described by Lesquereux, but in the absence of sufficiently com- 

 plete material of A. lesquereuxii with which to make comparison, a final 

 decision on this point must be reserved. 



Carya alba, Nutt. 



This species is not abundantly represented, being exhibited by one 

 terminal and one lateral leaflet only, and it therefore constitutes only 

 3% of all the material. It has, nevertheless, been noted on two former 

 occasions as occurring in at least four difrcrent localities within the 

 limits of the Don deposits. It is a characteristic element in the flora 

 of the Don period, of which, however, it does not seem to have formed 

 a very prominent feature. 



Clethra alnifolia. Gronov. 



Only one specimen of a leaf of this plant appears in the present 

 collection, of which it forms only l.-')4%. This is a first record for this 

 plant in the Pleistocene flora. It is at present unlaiown in the vicinity 

 of Toronto, being essentially a coast plant, but its northern extension 

 on the coast of Maine places it in essentially the same latitude. Its 

 occurrence m the Pleistocene of Toronto is readily consistent with its 

 present habitat, when we recall the former extension of the Pleistocene 

 sea into the region of Lake Ontario. Finally, it? occurrence in the flora 

 of the Don is in no way inconsistent with the general character of the 

 associated types. 



Ilippuris vulgaris, L. 



One specimen only, representing 1.54% of the entire material. The 

 fragment shows a stem 2.5 cm. long and 1 mm. wide, bearing two whorls 

 of leaves, with five to seven leaves in each whorl. The leaves are 

 8-9 mm. long, and not very well preserved, though the entire specimen 

 shows well-defined characteristics of the plant. This is the first record 

 for this species in the Pleistocene deposits. 



Juniperus, sp. 



Specimens designated as 4 and 5 from the Don Valley Brickyard 

 ■were found to be coniferous wood in a highly altered condition through 

 the action of decay and subsequent compression. Beyond the presence 



