THE TRACHODON GROUP it 
~ 
metto of Florida are frequentiy found in the same rocks with these 
skeletons. Here occur also such, at present, widely separated trees as 
the gingko, now native of China, and the Sequoia, native of the Pacific 
coast. Fruits and leaves of the fig tree are also common, but most abun- 
dant among the plant remains are the Equiseta, or horsetail rushes, 
some species of which possibly supplied the ‘Trachodons with food. 
Impressions of the more common plants found in the rocks of this 
TRACHODON AS IT APPEARED WHEN LIVING. 
From a model prepared under the direction of Professor H. F. Osborn by 
Mr. Charles R. Knight. 
period with sections of tree trunks showing the woody structure will 
be introduced into the group as the ground on which the skeletons 
stand. In the rivers and bayous of that remote period there also lived 
many kinds of Unios, or fresh-water ciams, and other shells, the casts 
of which are frequently found with Trachodon bones. ‘The fossil 
trunk of a coniferous tree was found in Wyoming which was filled 
with groups of wood-boring shells similar to the living Teredo. ‘These 
also will be introduced in the groundwork. 
