Geology. 417 
t plates contain fig fifteen “new species” of 
fossil shells and corals, besides others dese mer, and 
Several fossil leaves determine f them ed 
d d. 
2. Geological Survey of Ohio.—The State Geological Corps of 
Ohio, Prof. J. S. Newberry, chief geologist, Prof. B. An- 
their s The surveying party w 
ments to whom different districts were assigned. Of these, two, 
Opera he northern half of the state, were under the ae 
of. An- 
in 
diate bile i of the chief geologist; another, under Pr 
drews in the southeastern quarter, a 
Orton in the southwestern quarter of the State. 
The first duty assigned to the surveying party was to trace 
out the geographical extent of the different formations, so that an 
