66 ROYAL SOCIICTY OF CANADA 



in eiul view, and are therefore either obh)ng or iMuml. The interior ex- 

 hibits a number of small cavities, showing- the decay of structures origin- 

 all}' jiresent. A more extended examination led to the conclusion that 

 these bodies represent the inflorescence in a bud condition, or the fruit of 

 one of the plants otherwise represented. In a few instances they Avere 

 found attached to stems which were undoubtedly those of a Potamotjeton. 

 Comparison with the inflorescence of recent species of this genus show 

 that they bear a very close resemblance to the flowering spikes of both 

 F. pauciflorus and P. jmsiUus. As the resemblance to the latter is very 

 close both in point of size and external appearance, and as this species 

 has already been determined to be present, I feel that there need be no 

 hesitation in referring these structures to it. 



POTAMOQETON PECTINATUS. 



This species, at present widel}- distributed throughout Canada, is 

 represented in the nodules from J^esserer's by leaves and also by one speci- 

 men of the young inflorescence. The latter shows a young spike ter- 

 minal to the main stem before elongation of the peduncle, and central to 

 two leaves. The dimensions, as well as the whole aspect of the speci- 

 men, agree admirably with herbarium specimens of the species above 

 indicated. 



Equisetum limosum. 



A small portion of the silicified epidermis of an Equisetuin, either 

 E. limosum or E. hymale. The former has already been found at (Jreens 

 Creek, and the present specimen is therefore referred to that species. 



BeTTLA LITEA? y 



Represented in one case only by a portion of a leaf. The specimen 

 is most nearly comparable with Beiula lutea, to which it is referred pro- 

 visionally. This is the first record for this plant, a species which is at 

 the present time common, throughout Ontario and eastern Canada. 



POïENTILLA ANSERINA. 



This ])lant was found at Green's Creek some years since, and now 

 apjjears in th(; nodules at Eesserer's with considerable frequency. It is 

 quite likely that many of the exogenous stems which so frequently 

 occur in these nodules in the form of undeterminable fragments may 

 belong to this si)ecies. 



Fucus DIGITATUS. n. sp. 



A Fucus has already been reported as occurring in the nodules from 

 Green's Creek, and in the Leda clays at Eesserer's the same plant appears 

 in greater abundance and of larger size. In the original account of it, 

 I indicated that it could not be satisfactorily referred to any of our exist- 



