02 APPENDIX. 



like a counterpart of the fragment Bgured by the French author, who refers it to a group of Maples, which 

 includes among others A. coccineum, Michx. 



The conclusions to be derived from the determination of these few fossil species fully coincide with what 

 has been exposed by the table indicating the relation of the plants described in the report on the flora of 

 the auriferous gravel deposits. The group is Miocene by one species of Acer and one of Quercus, while 

 it bus of each of these genera one species living at the present epoch. It has also an Acer positively 

 identified with a species of the Gypses of Aix. Its relation therefore to the Miocene flora is more dis- 

 tinctly marked than to the flora of the present period. It lias two Atlantic types, not present now in the 

 Pacific slope, and two exclusively Califomian ones, represented now by one species of wide distribution, 

 Quercus chrysohpis, and by another probably modified by local influence, an Acer, intermediate between 

 Acer macrophyllum and A. grandidentatum. 



The relation to the Pliocene of Europe rests as it was formerly indicated, on the analogy, not identity 

 of one species only. 



