THE AGE OF ANTHRACOLITHIC ROCKS 725 
farther south has furnished us with an abundance of Fusulina very 
similar to, if not identical with, F. longissima. It is worthy of note 
that Schwagerinas and F’. longissima are associated in some of the 
European deposits, but among somewhat older faunas. When we 
consider that Schwagerina is totally unknown in the Atlantic province 
and consider the route which it must have taken in reaching this 
region—Eastern Himalayas, China, California—it is but natural 
to expect it to appear in a somewhat higher horizon than that from 
which it started, since it is improbable that all the barriers of Eurasia 
and America were removed to furnish it simultaneous passage. For 
this reason its appearance among an open-sea Permo-Carboniferous 
micro-foraminiferal fauna of the Atlantic province may be explained. 
It should be remarked, however, that some species of Schwagerina 
are found in rocks of Permo-Carboniferous age in Eurasia. 
Of the sponges there are two genera worked out, that permit of 
direct comparison. They are Amblysiphonella and Steinmannia. 
Amblysiphonella prosseri, from the Topeka limestone in Kansas and 
a horizon not any higher at Weeping Water, Nebraska, is closely 
allied to a species from the Lower Productus limestone or Amb 
beds of the Salt Range in India, while Steinmannia described by 
Dr. Girty from the Allen limestone seems to have a close relative 
in the specimens of that genus in the Middle and Upper Productus 
limestone of the Salt Range. The fact of peculiar interest is that 
the relative positions of the two in Kansas is reversed from what 
it is in India, Amblysiphonella occurring at a higher horizon than 
Steinmannia. 
There are two species of corals common to the Kansas section 
and the Artinskian—Dolomite Suite—of the Donnez Basin of south- 
eastern Russia: Michilinia eugeneae, which is confined to Series I 
and II in the Kansas rocks, and Lophophyllum profundum, occurring, 
probably, throughout the section from Series I to IV inclusive. 
Several of our brachiopods appear to have relatives abroad. 
Chonetes mesolobus and C. laevis (not C. geinitzi) occur in the Schwa- 
gerina horizon in the Ural-Timen region, while in Kansas they are 
confined to Series I, and are separated from Schwagerina by 1,800 
feet of deposits. Chonetes variolatus and C. verneuilanis are found 
in the Cora and Schwagerina horizons and in the Kansas section are 
