OF DENISON UNIVERSITY. 
Ill 
above the Berea and there seem to be several identical species but our 
time was too brief to collect systematically. A species of Syringothy- 
ris at least seemed to be common. The Bedford shale on the other 
hand seems more to resemble the Huron and in some places where it 
lies superposed on it is difficult to distinguish. Were it possible that 
this close interblending had escaped Dr. Newberry it would seem 
probable that some of the species attributed to the Huron are really 
Bedford. 
All discussion of the age of the lower Waverly now turns upon 
the question as to the age of the Erie and Bedford, and this question 
stands in need of careful field-work and especially more extended and 
minute palaeontological examination. Meanwhile the following sug- 
gestions may be hazarded. First, we may assume as proven that the 
Erie shales are of Chemung age, that is, in the broad sense, including 
Portage. The fossils, on the whole, indicate lower Chemung or Por- 
tage. Are we to conclude froin this that all which lies stratigraphically 
above the Erie is certainly later faunally than the top of the Chemung 
as seen in New York strata? We think this does not by any means 
follow. We are struck in examining the stratigraphy of the Waverly 
by the fact that the dip of the true Waverly strata is south-east and the 
great area of its deposition is in a different basin from the Chemung. 
The Waverly strata thin out to the north-east while the Erie increases 
in thickness in the same direction. The point where the Erie and 
Waverly stata come into juxtaposition is not, however, along the shore 
of the Waverly sea, but far to the eastward of the littoral deposits. 
The two sets of rocks were formed then by different but occasionally 
interblended seas. The line of strike measurably conforms to the 
shore line in the Waverly. Thus the plane of looo feet elevation in- 
tersects the Moot’s run horizon in Licking county and some distance 
west of Portsmouth in southern Ohio, while at Lodi the same horizon 
seems nearly at 825 feet probably, throwing the line of intersection 
further toward the west. There has not been any considerable change 
of level since the sediments were deposited beyond the gradual sink- 
ing of the centre of the basin. It is evident that the Devonian basin 
in New York and that of the Carboniferous in Ohio are not coincident 
nor have their movements followed the same rhythm. 
When the strata which constitute the Chemung in New York 
were forming, what was going on in Ohio ? 
There seems to have been a pretty general uniformity of condi- 
