GENERAL CONCLUSIONS. 55 
— subject from an acquaintance with the vegetable remains preserved in 
abundance in the Pliocene and post-Pliocene deposits of the Mississippi and 
the lower Ohio River. An immense amount of material is there buried, 
awaiting future investigations. This will prove even more important to 
botanists and paleontologists than those plants which I have had the op- 
portunity of describing in this memoir. 
