Permian Formations of Kansas — Prosser. 149 
There was no change, selection or elimination and if it 
favored the views which the writer expressed, such was the 
concensus of the evidence before him. At that time, how- 
ever, the writer inadvertently overlooked the following 
statement of Nikitin, the well-known Russian authority on 
the Carboniferous : Finally the Americans, as is known, 
generally refer, contrary to European geologists, the so- 
called Permo-Carboniferous of Mr. Meek to the Carboni- 
ferous system.* 
Regarding the correlation with and retention of the 
name Permian for the upper American Paleozoic deposits 
the writer in ,1902 made the following statement: 
"The number of American geologists who believe that these 
Upper Paleozoic formations should be correlated with the Permian 
and given the rank of a period or system is probably still smaller 
than the number of those who would retain the name Permian but 
classify it as the upper series of the Carboniferous. * * * It 
has appeared to me, however, that the weight of evidence favored 
correlating the upper formations with the Permian. "t 
Since the publication of the above paper additional evi- 
dence favoring the correlation of the upper Paleozoic de- 
posits of Kansas with the Permian has been received. The 
following brief summary will give an idea of its nature : 
In January. 1903, Dr. Sellards wrote me as follows: 
"The fossil plants in my opinion support your belief in the ex- . 
istence of true Permian in Kansas (below the Red Beds). The 
flora of the Marion (or Wellington) differs specifically almost in 
toto from that of formations as low down as the Lawrence shales 
[which occur near the middle of the Missourian series of Dr. Keyes 
and form the lower member of professor Haworth's Douglas 
formation] and indicates as I have already stated (Kan. Acad. Sci., 
1900; Kan. Univ. Bull., vol. 9, Jan., 1900) a lower Permian age. 
The plants in this case are pretty conclusive and the genera and 
species are identical with or most closely related to those of the 
lower Permian of Europe."* 
Dr. Sellards lias also found insects exceptionall) well 
preserved in the Marion formation in the southern part of 
Dickinson county. He also states that 
"A considerable number of insects had been previously obtained 
from the Coal Measures near Lawrence, Kansas" 
and he contrasts these two insect faunas as follows: 
* Mem. Comite Gfiologique, vol. w No. ">. 1890, p. 152. 
; Jour. Geol.. vol. x. p. tl:^. 
* Letter of Jan. 12, 1!i<i3. 
