1889 ] 
347 
[Foerste. 
Comparison of the Clinton fossils of the eastern border of 
North America with those of the Cincinnati anti- 
clinal. 
It may seem at first thought that the strata of the Clinton group 
could be scarcely compared in the manner here suggested, and yet 
there are features at least of a negative sort in the Clinton of the 
Cincinnati anticlinal which will distinguish it from that of the Al- 
leghany axis on the east. 
Perhaps the most striking of these is the entire absence of Lep- 
tocoelia hemispherica from the anticlinal, while in the east this spe- 
cies is found throughout the entire range from Anticosti, through 
New York, Pennsylvania and Tennessee to Alabama. 
Another is the absence of Pentamevus ovalis from the anticlinal, 
while it occurs in New York, Tennessee and Alabama. 
Strophomena corrugata , the elongate form, occurs in the Clinton 
of New York, Pennsylvania and Tennessee, but not on the anti- 
clinal. The variety pluristricita is also found in New York and 
Tennessee, but not in the Clinton of the anticlinal. 
Strophomena obscura is found in the Clinton of New York and 
Tennessee, but not in the Clinton of the anticlinal. 
Encrinurus punctatus is found rather frequently in the Clinton 
of Anticosti, New York, Tennessee and Alabama; it is exceed- 
ingly rare in the Clinton of the anticlinal and occurs rarely in a 
modified form from the Niagara of Ohio. 
Cornulites Clintoni occurs in the Clinton of New York, Tennes- 
see and Alabama ; does not occur in the Clinton of the anticlinal, 
although a rather distantly related form, Cornulites proprius, occurs 
in the Niagara of Indiana. 
A more interesting series of observations is that certain species, 
more or less common in the Clinton of the east , do not occur in 
the Clinton of the anticlinal, but appear at a later date in the Ni- 
agara. 
lllcenus Ioxus is found in the Clinton of New York and is doubt- 
fully identified in the Clinton of Alabama ; it does not occur on the 
anticlinal, but is known from the Niagara of Indiana and Wiscon- 
sin. 
Ceraurus insignis is found in the Clinton of New York ; not in 
the Clinton of the anticlinal, but in the Niagara of Indiana and 
Wisconsin. 
