4 Later Exti I • North Ann ri 



The plants collected by Messrs. Marcou and Capellini em- 

 braced it species, which have been described by Prof. 

 Heer In the " Memoires de la Society Eelvetique des Sciences 

 Naturelles, L866;" viz.: Populus litigiosa, P. Debeyana, Salix 

 . Betuli lenticidata, Ficus primordiaUs, Plar 

 : Y, wbt rryana, Prat oidi s gn viUimformis, P. acuta, P. 

 dapl '■'■■-. Aristolochites dentata, Andromeda Parlatorii, 

 ros primmva, Gissites insignia, Magnolia alternans, M. 

 ' , ii and Liriod ndron M< < kti. 

 It is an interesting fact that ofthese sixteen species, but three 

 identical with those obtained before from the same quarries, 

 or those collected by myself elsewhere at the same geological 

 horizon — an illustration of the richness of the flora which they 

 represent. My own observations prove this richness still more 

 .-. as I have said, in the outcrops of the Lower Creta- 

 me rocks at the West, I have detected al least a hundred 

 spec conifers and angiospermous trees. Of these it rarely 

 hap that, in the chance exposure of a cliff or water-washed 

 surface, anything like a perfect specimen could be detached 

 and brought away. A.8 a consequence we have, in the figures 

 and descriptions now published or prepared, but a very imper- 

 fect view of the flora of the Cretaceous period <>n this conti- 

 nent, even as ii lias 1 M exhibited to my eyes; and there is 



every reason to believe that but a small proportion of its ele- 

 ments have as yet been obsen ed at all. 



On the western margin of the continent it i- well known 



that th" ( 'retaceous Btrata are quite largely de\ eloped : having 



sognized in Sonora, California, Oregon, Washington 



I i iry, and Vancouver's Island. From the latter locality 



a number of fossil plants have been collected, which 



been described by Prof. Heer, Mr. Lesquereux, or myself. 



I knov ledge which we obtained of 'he < 'retaceous beds 



of\ Island was derived from the descriptions bj M , 



Me< [Ynneactione of the Alhan\ Institute, vol. 4, p.37) <>t' 



Borne fossil mollii6ks collected by Dr. Turner. Subsequently, 



