250 
Aug. F. Foerste 
sequently, various other sections were studied, and a fair recon- 
naissance of the Lorraine territory made. 
One of the results of the investigations at the Bennett bridge 
locality was the discovery of very typical specimens of Whitea- 
vesia pholadiformis, associated with Ischyrodonta unionoides, and 
other forms which Dr. E. O. Ulrich regarded as suggesting middle 
Maysville (lower Bellevue) affinities. Moreover, at the distinctly 
lower horizons exposed along the river east of Pulaski, the same 
Ischyrodonta unionoides occurred associated with various other 
forms which to Dr. Ulrich again suggested middle Maysville 
rather than Richmond affinities. This is not strange in view of 
the fact that this fauna at Pulaski contains Trinucleus. It is not 
intended by these observations to convey the impression that the 
middle Maysville age of the Pulaski and Bennett bridge faunas 
has been definitely determined, but rather that the Bennett bridge 
fauna, with its Whiteavesia pholadiformis, did not present other 
forms regarded as characteristic of the Richmond, while forms 
suggesting middle Maysville age were present there and at 
Pulaski. 
For the present probably it would be safer to assume that the 
upper or Pulaski part of the Lorraine fauna is younger than the 
Eden at Cincinnati and older than the upper or McMillan di- 
vision of the Maysville, while the lower, shaly part of the Lor- 
raine, below the typical Pulaski zone, may be correlated with 
the Eden. In the absence of fossils, the typical Salmon river 
falls or Oswego sandstone may be correlated with the upper 
Maysville. 
From the recent studies of Dr. Rudolf Ruedemann^ it will be 
seen that the Utica black slate and the overlying dark Frankfort 
shales were described from the western or Trenton Falls basin 
of New York. In view of the presence of several basins already 
discovered it is necessary to remember that the territory west of 
Rome has not yet been investigated with the exactness demanded 
for exact correlation. For instance, while Vanuxem regarded the 
lower, more shaly part of the Lorraine section, in Oswego and 
Jefferson counties, as equivalent to the Frankfort shales of the 
Trenton Falls basin, it is by no means certain that the Frankfort 
shales extend this far west. 
1 The lower Siluric Shales of the Mohawk Valley, Bulletin 162, New York State 
Museum, 1912. 
