66 BeErRRY: MESOZOIC FLORA OF ATLANTIC COASTAL PLAIN 
the Ripley and the general facies is more similar than this figure 
would indicate. There are also eight species common to the 
Vermejo flora of Colorado and New Mexico, all but one dicoty- 
ledons, and including several that have been found nowhere else, 
as the abundant Cissites panduratus Knowlton. This would 
serve to confirm Knowlton’s contention that the Vermejo is older 
than Laramie, since the only Ripley species recorded from the 
‘Laramie is Myrica Torreyi, which also occurs in post-Laramie 
deposits in the West. Five Ripley species are found in beds in 
the West that are referred to the Montana Group, four in the 
Mesa Verde formation, two in the Fox Hills and five in the Fruit- 
land formation. 
As regards comparisons with European Upper Cretaceous 
floras five species are recorded from beds on that continent classed 
as Cenomanian, two from beds classed as Turonian, three from 
beds classed as Emscherian and six from beds which are either 
Santonian or Campanian -in age. The Ripley flora contains 
noticeable elements common to that of the sands of Aix-la- 
Chapelle (Aachen). How many it is not possible to determine 
since large collections from around Aix-la-Chapelle made by Debey 
were never studied and only the ferns have received adequate 
treatment. The plants described from the plastic clays of Baume 
(St. Vaast) by Coemans and found at La Louviére are probably of 
the same age. 
There has been considerable discussion and differences of 
opinion regarding the age of sands of ‘Aix-la~-Chapelle. These 
sands contain a sparse shallow water marine fauna with Exogyra, 
Trigonia, Eriphyla, Inoceramus, etc., and lenses of clay containing 
fossil plants. The sands are overlain by a highly fossiliferous 
glauconitic sand—the Actinocamax quadratus zone of the Cam- 
panian. This relationship would seem to indicate that the under- 
lying plant bearing beds represented the littoral and continental 
deposits of the Santonian or at most could not be older than the 
lower Emscherian Coniacian substage. Despite this Haug refers 
these sands to the Turonian. 3 
They are siliceous and cross-bedded and in part represent 
coastal dune sands so that they might conceivably be considerably 
_ older than the overlying strictly marine sediments. The question 
