230 



THE GEOLOGICAL HISTORY OF PLANTS. 



the river Ottawa, where it flows over the beds containing 

 these fossils. 



9. Caricece- and Graminece. Fragments in nodules 

 from Green's Creek appear to belong to plants of these 

 groups, but I cannot venture to determine their species. 



10. Equisetwn scirpoides, Michx. Fragments in nod- 

 ules, Green's Creek. This is a widely distributed spe- 

 cies, occurring in the Northern States and Canada. 



11. Fontinalis. In nodules at Green's Creek there 

 occur, somewhat plentifully, branches of a moss appar- 

 ently of the genus Fon- 

 tinalis. 



12. Alga. With the 

 plants above mentioned, 

 both at Green's Creek 

 and at Montreal, there 

 occur remains of sea- 

 weeds (Fig. 79). They 

 seem to belong to the 

 genera Fucus and Ulva, 

 but I cannot determine 

 the species. A thick 

 stem in one of the nod- 

 ules would seem to indi- 

 cate a large Laminaria. 

 With the above there are 

 found at Green's Creek a 

 number of fragments of leaves, stems, and fruits, which 

 I have not been able to refer to their species, principally 

 on account of their defective state of preservation. 



None of the plaiits above mentioned is properly arctic 

 in its distribution, and the assemblage may be character- 

 ised as a selection from the present Canadian flora of some 

 of the more hardy species having the most northern 

 range. Green's Creek is in the central part of Canada, 

 near to the parallel of 46°, and an accidental selection 



Fig. 79.— Frond of Fucus. Pleisto- 

 cene, Canada. 



