J. W. Dawson—FPaleozoic Land Snails. 415 
plants is confirmatory of this view, though the shells are 
attached by a flattened side to these plants, and are also 
ors, 11 there w 
successors, but from any contemporary animals allied to them, 
It is probable that the land snails of the Erian and Carbonif- 
erous were neither numerous nor important members of the 
occurred. Further, what we know of the vegetation of the 
Paleozoic Period would lead us to infer that it id not abound 
in: those succulent and nutritious leaves and fruits which are 
of form or structure in this type of life in that vast interval of 
time which separates the Erian Period from the present day. 
