375 



witli Yihurniim ivttmclifoUum closely allied to V. platanoides of the same 

 locality. The remains of Sahal Grayana^ too, refer Point of Eocks by 

 identity of species to Vancouver's Island, the Mississippi Tertiary, and 

 Golden. We may mention still as new, species less important in regard, 

 to their local references : Qiiercus competem, seemingly allied to different 

 Miocene species of Europe, though not identifiable with any; Blms mem- 

 hranacea, comparable to our present Rhus aromatica, and also to the 

 European Bkus Pyrrlim of the Miocene; that peculiar species Trapa 

 microphylla, found mixed with rootlets of water-plants, and whose rela- 

 tion cannot be recognized with any fossil species except Neuropteris 

 cmgulata; and Dryophyllum erenatitm, representative of a group or of a 

 genus which has a large number of as yet undescribed forms in. the 

 Cretaceous of Belgium. Of this genus, however, we know already three 

 species irom the Cretaceous of this country and eight species from the 

 Lower Eocene of Europe. These are the data from which we have to 

 derive our conclusions in regard to the age of the Point of Eock for- 

 mations. To do it more clearly, I give here, as a resume, the table of the 

 species described from this locality, with indication of their relations, 

 as far as thev are known. 



* "Id." for identical ; " an." for analogous. 



This table shows that, of these twenty-three species, two are identical 

 witli Canadian species recognized as Tertiary, as seen in the quotations 

 given above from the geological report of Prof. Gr. Dawson ; seven are 

 identical with, and five related to, species of the Lower European Mio- 

 cene ; two identified with the Arctic formations considered Miocene ; 

 three identified with, and one allied to, species of Golden ; eight identi- 

 fied with, and. one allied to, species of Black Butte ; and two which have 

 some analogy with Cretaceous types. 



For this last remark I take the broodest range of probability of 

 relationship, for we do not know any Cretaceous Dryophyllum from 

 Europe, except D. cretaceuni, published by Sa porta in his Gelinden Flora, 

 for a point of comparison for the species of this Lowest Eocene locality ; 

 and the identity of Trapa microphylla with the leaves published as 

 Neuropteris anyulata is not positively ascertained. I will add still that 



