OF BE^s.ISQN UNIVERSITY 
, 3 ^ 
characteristic species. At Lodi, Medina County, occurs thirty feet of 
argillaceous shale full of concretions, and in it are found four species 
which occur at Moots’ Run, Licking County, viz : Fmesteiia herrickana, 
Rlwmbopom ohioensis, Pterinopceten carinifenis^ and TerebratiUa ? incon- 
stans, while Cyrtinia acutirostris which occurs in the nodule layer at 
Wooster is also collected here. This stratum is about 125 feet below 
the carboniferous conglomerate. It would thus seem that although the 
fauna at Lodi differs considerably from that of Moots’ Run, the differ- 
ence could be accounted for, by the gradual disappearance of species 
and new forms taking their place. We would correlate the Cuyahoga 
shale with its equivalents farther south in the same manner as the 
concretionary zone, as there is no reason to think that the Waverly 
strata, which were deposited subsequently, did not sustain the same 
relation to each other as when the concretionary stratum was deposited. 
The Cuyahoga shale, however, seems to have included elements above 
any of its equivalents in Central Ohio. For example, Entolium avicu- 
latum and several species of Avicidopecten, which have affinities with 
coal measure forms. The different physical conditions under which 
the Cuyahoga shale was deposited necessarily brought in new forms, as 
Allorisma cuyahoga, Eutoliiim aviculatii»i , Sole no my a cuyakoyaensis, and 
Macrodon tennistriata, and several other species which are not found 
farther south. It has also some species which occur in the Waverly of 
Central Ohio, viz : Nucula houghtoni, which has a range from thirty- 
five feet below conglomerate I to five feet above conglomerate II, 
Spirfer bipllcatus, which is found in the middle part of division III, 
Conularia newbei'ryi , which ranges from II i to III2, and Plcurotoma- 
ria Stella, which is found in IIli. These species will serve to illus- 
trate the composite nature of the Waverly as represented in the Cuya- 
hoga valley at and above the Big Falls. 
It has been suggested in volume IV, page 103, of the Bulletin of 
Denison University, and in Vol. VI, page 37, of the Ohio Geological 
Survey, that the Cuyahoga shale as exposed in the valley of the Cuya- 
hoga, should be separated on account of lithological and palaeonto- 
logical differences existing between the different portions of tne series 
as exposed in that locality. We will now describe the strata there, 
giving their equivalents as represented in Central Ohio as nearly as 
possible. It must be remembered, however, that the three subdivis- 
ions into which the series have been divided, blend into each other so 
that no line can be drawn separating them. Extending from the Big 
