324 O. C. Marsh—History and Methods of 
In the short time now at my command, I can only attempt 
to present a rapid sketch of the principal steps in the progress 
of this science. The literature of the subject, especially in 
connection withthe discussions it provoked, is voluminous, 
and an outline of the history itself must suffice for my present 
purpose. 
to the nature o ao remains. Were they mere “sports 0 
a them seem to have appreciated in some instances their 
true @ 
Vidi ego quod fuerat solidissima tellus, 
Esse fretum: vidi factas ex equore terras ; 
Et procul a pelago conche jacuere marine. 
* Metamorphoses, Liber XV, 262. 
~~ 
5 ES ae ase 
