792 THE JOURNAL OF GEOLOGY. 
Russian Geological Survey, stated that he agreed with Waagen 
in considering the Nebraska City beds, in southeastern Nebraska, 
similar in age to the Artinsk sandstone group of the Ural Moun- 
tains, which he called Permo-Carboniferous.? 
In 1891 appeared Waagen’s exhaustive work on the geo- 
logical classification of the Upper Paleozoic rocks of the Salt- 
Range in northern India, in which the author shows the striking 
relations ‘‘that undoubtedly exist between the American Coal 
Measures and the deposits of the Salt-Range.”3 Waagen fol- 
lowed Neumayr and made two large divisions of the Paleozoic; 
for the upper division, which included the Carboniferous and 
Permian systems, he proposed the name, ‘‘ Anthracolithic epoch” 
which he defined as equivalent to Neumayr’s ‘Upper Pale- 
ozoics.’’ 4 
Waagen prepared a table giving his views of the correlation 
of the Upper Paleozoic strata of the Salt-Range with similar 
deposits of other countries,’ and the Permian system was com- 
posed of the Permo-Carboniferous, Rothliegendes, and Mag- 
nesian Limestone groups. The correlation of the American 
deposits are of special interest to us, and represents that part of 
the table to which we shall refer. Waagen, for North America, 
drew the dividing line between the Carboniferous and Permian 
systems at the top of the ‘““Upper Productive Coal Measures” 
and referred the ‘“‘marine beds of Plattsmouth | Nebraska] and 
beds below (up to about 2000 feet in thickness) down to the 
*Mém. Com. Géologique, Vol. III., No. 4, p. 366. In Murchison’s description of 
he geology of Russia, the Artinsk sandstones were referred to the Carboniferous 
(Geol. Russia in Europe and the Ural Mts., Vol. I., 1845, p. 129). The correlation 
and palzontology of the Nebraska City beds have been carefully discussed by Pro- 
fessors Marcou, H. B. Geinitz and Meek, and the consideration of this question is 
reserved for a later paper. Professor Hicks at a later date briefly described deposits 
in Gage county, in the southern part of Nebraska, which probably belong to the Permo- 
Carboniferous or Permian of Kansas (Am. Naturalist, Vol. XX., 1886, pp. 881-3; 
abstract in Proc. Am. Asso. Adv. Science, Vol. 35, 1887, pp. 216, 217). 
2Mem. Geol. Sury. India, Pale. India. Ser. XIII., Salt-Range Fossils, Vol. IV., 
Pt. IJ., Geological Results, Calcutta. 
3Ibid., p. 201. 4Tbid., p. 241. 
5 Ibid., “Tabular view showing the relations of the Salt-Range Upper Paleozoic 
strata to the deposits of other countries,” op. cit., p. 238. 
