790 THE JOURNAL OF GEOLOGY. 
logic report of the region is published. In order to appreciate 
the questions involved in the correlation of these formations, it 
is important to mention briefly the proposed classifications which 
have appeared within the last few years. 
After the publication of the final views of Meek and Hayden 
in 1872, which referred especially to the Upper Paleozoic of 
southeastern Nebraska,* the next important announcement was 
that of Dr. Newberry at the Berlin International Geological 
Congress in 1885, where he is reported to have stated that ‘‘He 
had traversed all the States and Territories of the Union, and had 
examined the so-called Permian in many localities, but, in his 
judgment, it could not be separated from the Coal Measures. 
It is true that in the upper Carboniferous strata certain genera 
of mollusks appear, which are regarded as characteristic of the 
Permian, such as Monotis, Bakevellia, Pleurophorus, etc., but these 
are associated with and outnumbered by the most characteristic 
Coal-measure forms, such as. Spirifer cameratus, Athyris subtthta, 
Productus semureticulatus, etc., and were by these inseparably 
bound to the Carboniferous system.”* As far as the paleon- 
tology is concerned we have shown above that the statement of 
Dr. Newberry is entirely incorrect in regard to the range of the 
Brachiopods in Kansas. We have not seen Srrifer cameratus 
above the top of the Wabaunsee formation, or the last two 
species above the Chase formation. However, the most mis- 
leading part of the statement is that these Brachiopods out- 
number the Lamellibranchia in all of these deposits. In the 
Neosho and Chase formations possibly the Brachiopods are the 
more abundant ; but in the Marion formation they are extremely 
rare, a few specimens of Derbya only having been found, and the 
Permian Lamellibranchia are conspicuously the dominant fossils. 
In 1889, Dr. Th. Tschernyschew, the able Director of the 
«Final Rept. U. S. Geol. Surv. Nebraska and portions of adjacent Territories. The 
field work upon which this report was based, was accomplished during 1867, and the 
report was submitted for publication on March 1, 1868, but was delayed until 1872 
(see pp. 3, 139). 
2 The Work of the International Congress of Geologists, 1886, p. 29. Dr. New- 
berry’s statement of the absence of the Permian in America was published in the Am. 
Jour. Sci., 3d series, Vol. XXX., December, 1885, p. 469. 
