84 The Ottawa Naturalist [July 



essentially identical, and one might well be led, at first, to question 

 if they are not, after all, only one form of the same species. But 

 the number of pits which characterize the radial walls of the 

 ray cells, the number of rows of pits on the radial walls of the 

 tracheids, and the size and form of the pits on the tangential 

 walls of the summer tracheids, point with certainty to specific 

 differences, and the fossil is, therefore, described under a new 

 name, for which purpose that of the province seems to be ap- 

 propriate. 



General Coxclusioxs. 



The character of the material discussed in the foregoing 

 studies, leaves very little room for any conclusions which would 

 be of value in stratigraohical determinations. 



The specimen of Picea offers only one of a very few examples 

 of the occurrence of cones of this genus in Cretaceous deposits. 

 Berry has recently shown the existence of beautifully preserved 

 cones of Picea diffwoodensis in the Upper Cretaceous of New 

 Jersey. ' These he regards as comparable with the cones 

 of P. excelsa. They, however, offer no points of comparison 

 with P. alhertensis, inasmuch as they are much larger and more 

 linear-oblong. 



As already noted, Penhallow has recorded the sparing 

 occurrence of cones of P. colmnbiensis in the Tertiary of Kettle 

 River, British Columbia. Knowlton has found cones of P. har- 

 rimani ^ in theUpperEoceneofKukak Bay, Alaska, a form which 

 is in no sense comparable with P. albertensis, though it presents 

 many features strikingly similar to those of P. diffwoodensis. 



It may be recalled in this connection, that the foliage of 

 what are at present regarded as distinct species — P. tranquil- 

 lensis, Penh., and P. qnilchensis, Penh., ^ — has been 

 obtained from the Tertiary of the Tranquille River and from 

 Quilchena, B.C., and there is no present evidence to show that 

 the more recently observed cone from the Cretaceous of Alberta, 

 is not related to one of them, rather than to P. cohimhiensis. 

 If these two were to be regarded as specifically identical, it would 

 be possible to recognize a wider geological range for the species 

 than has heretofore been known; but in the absence of external 

 characters in the Alberta spiecimen, such a correlation would be 

 unsafe. 



Cupressoxylon macrocarpoides, Penh., has been determined 

 on previous occasions, to be common to both the Tertiary and 

 Cretaceous, "^ and its present occurrence in Cretaceous deposits, 



1. The Flora of the CHffwood Clays. Geol Surv. N.J., 1905. 



2. Fossil Plants from Kukak Bav Harriman Expd., 1904, iv, ISO. 



3. Report on the Tertiary Flora of British Columbia. Geol. Sxirv. Can., Monogr. 1908. 



4. N. A. Gymnosperms, Penhallow. 238. 



