22 
1. Geological formations surrounding the prairie, and 
the characteristic vegetation of same. 
2. Past condition of prairie, especially since 1832, in 
which year the Big Spring Indian reservation was thrown 
open to settlement. 
3. The drainage of the prairie, past and present, and 
its effect upon the general level of same, and also upon the 
character of the vegetation. 
4. The lagging behind of effects, as shown by plants 
clinging for a time to a locality after the conditions have 
changed; in this instance from the hydrophytic to the mes- 
ophytie. 
5. he nature of the soil in the various portions and 
the characteristic vegetation of same at present time. 
6. Tree introduction upon the prairie; the order and 
cause. 
a 
7. The prairie under cultivation ; the crops grown upon 
it; the original species of plants, which still maintain their 
foothold; the introduced species of plants which become 
most troublesome. 
*This work is conducted under a grant from the McMillin fund. 
SIX NEW SPECIES, INCLUDING TWO NEW 
GENERA, OF FOSSIL PLANTS: 
H. HERZER. 
Palaeophycus, Hall. Palaeophycus clavifrons. Nov. Spec. 
(Plate I.) 
A much ramifying marine weed, shooting at once at 
sharp angles a number of branches, which at distant inter- 
vals multiply again in the same manner. Each branch 
seems a barren, rugged cylinder, beginning at its out- 
growth thin as twine, then assuming a thickening of 3? 
inch, giving the rather lengthy branches a club-like form. 
—Sand-sone flagging, Harmar Hill, Marietta, Ohio. 
