[PBNHALLOW] THE PLEISTOCENE FLORA OF CANADA 65 



allowed to stand provisionally, subject to the contirniution of future 

 research. 



HyPNUM PLUITANS. 



Several fragments of the leafy stems of a moss, usually about 18-20 

 mm. long, were encountered. These were found to be comparable with 

 H. fluitans of Linnœus, and are therefore referred to that species. This 

 species, which is at present a widely distributed one, is now found in the 

 vicinity of Ottawa in McKay's woods. {Macoun.) 



Cyperace^. 



In several of the nodules were small seed-like bodies about 1 mm. 

 broad. In one instance the seed was split open, showing the inner face 

 of a hard and light-coloured testa or pericarp. It was at first surmised 

 that it might represent the fruit of a Fotamoijeton, but a careful com- 

 parison with the fruit of recent specimens showed that this could not be, 

 and for the present their true affinity must remain a matter of conjecture 

 only. In another instance a carbonized seed or fruit was found to be 

 distinctly of the external aspect of a cyperaceous fruit, and we may 

 therefore refer all such bodies to this family provisionally. 



In addition to these fruits, all the nodules contained more or less 

 numerous fragments of what appeared to be the leaves of sedges, and for 

 want of more exact ditferential data they may be provisionally referred 

 to the Cyperacete. 



POTAMOGETON PERFOLIATUS. 



This species, represented by several leaf fragments, Ixas already been 

 obtained from the Green's Creek nodules. 



POTAMOGETON RUTILANS. 



In the previous description of the Grreen's Creek fossils this species 

 was announced provisionally. In the nodules from Besserer's a number 

 of plants of the same description have been met Avith, and in a much 

 better state of preservation, some of the specimens being small plants 

 about six to eight centimetres high, and showing the root system fairly 

 well. It is thus possible to assign them with some degree of confidence 

 to the species above indicated. 



PoTAMOGETON PUSILLUS. 



This species, already reported from Green's Creek, is found in abun- 

 dance in the nodules from Besserer's wharf. They are represented by 

 both leaves and stems in a fairly well preserved state. Many of the 

 nodules show short, oblong or round bodies of a composite character, the 

 true nature of which remained in doubt for some time. They usually 

 measure 1x3 inm., and are sometimes presented in side view, or again 



Sec. IV., 1896. 5. 



