FOSSIL MAMMALIA OF EUROPE. IIl5 
Sections through the leaf and base of young stems have been 
made, but the apparatus at hand does not permit of a section thin 
enough to give structural details. The organic connection between 
the leaf and the base of the young stem is clearly shown, and the 
young plant evidently starts in connection with the fibro-vascular 
bundles of the leaf, but my sections do not clearly show the nature 
of the connection. 
The cells of the very base of the young stem and the adjoining 
leaf cells were crowded with chlorophyll grains, while there were 
very few in the other leaf cells, showing clearly the much greater 
constructive activity (anabolism) of these tissues. 
PLYMOUTH, N. H. 
NOTES ON THE FOSSIL MAMMALIA OF EUROPE. 
CHARLES EARLE. 
VI. 
Remarks on the Fossil Tapiroids of France. 
As far as our paleontological knowledge stands in regard to 
the evolution of the modern tapirs, this phylum arose in Europe and 
America at about the same time. In America we find in the Bridger 
the genus Isectolophus, which is considered to represent one of the 
stages leading to Tapirus. 
Prof. Albert Gaudry has lately published an important paper? 
on the evolution of the teeth of fossil Tapiroids and refers remains 
found in the Middle Eocene of Argenton, France, to the American 
genus Colodon, which he includes in the tapir phylum. Now, in the 
first place, Colodon comes from the Oligocene, or White River Beds, 
whereas the beds at Argenton are equal to the Middle Eocene, or 
Bridger. The teeth which Professor Gaudry has referred to Colodon 
minimus, in my opinion, should be identified as those of the American 
genus Isectolophus, or a very closely related genus. This is more 
in harmony with the origin of the tapir’s tooth, as in Colodon the 
metacone is concave, whereas in Isectolophus this cusp is convex, 
like that of the recent tapir. 
1La dentition des Ancéstres des Tapirs, Bull. Soc. Geog. de France, p. 315. 
1897. 
