F. V. Hayden on the Geology of Kansas. 39 
to represent in succession, first, Potsdam Sandstone from the 
Black Hills; 2d, forms indicating Permian both in Kansas and 
the region of the Black Hills; 38d, fossils of the Jurassic ty 
from the region of the Black Hills; 4th, Carboniferous from the 
Black Hills. (Signe ed) . Barrp.” 
This memorandum is not noted in the order the fossils were 
arranged ; the clause in regard to the Carboniferous was accident- 
ally omitted between the Potsdam Sandstone and the Permian, 
and then added at the end after the Jurassic. Nor is any men- 
tion made of the fossils sent from Kansas to Mr. Meek by Mr. 
Hawn, nor of a small collection from igi ome ba got communi- 
cated by Dr. Cooper which were at the ing on the 
table; though both of these gentlemen itieed 7 fall 
collecting and sending these fossils, in the paper published by 
Meek and H ayden 
t is with co one nceabts reluctance that this subject, which we 
had thought entirely settled, has been touched upon here; but 
the facts already mentioned seemed to demand such a statement. 
At the same time that Meek and Hayden manifest no desire to 
ignore be connection of Mr. Hawn and Prof. Swallow with the 
Pe 
cial report on the geology of that region, treatin open this 
ee and speaking of the labors of others in that connec- 
cae Prof. Swallow’s former papers, he gives the total thickness 
of the Upper and Lower Permian as he understands then, at 
820 feet, and in the report under review the thickness of the 
same beds is given as 704 feet Linch. This is ae as near an 
apparent i 
ignore our agency in the development of the = of the ae No true-minded 
geologist in reading siosg Sw. _ ~ _— r his own signature as given in 
this article and the no cee a ipebtind | to a paper  publised in the Trans. 
Albany Institute, March eon possibly err in re 
of the Permian in Kansas. During ae year 1857, I had ge oe fortune to be 
: : rama : 
Mr. Meek collections from Kansas. In numerous letters from Mr. Meek wie ‘t 
he im) upon me the importance of ot rama 
for Permian fossils. “In seomet ed Oct. 20th, 1857, he said 2 had 
« some — sis ree aj. Hawn “ieee ly either Upper 
woul i 7 should prove to be the ae eee” 
ov. saagty a 9 speaking of some Sonali had sent him from near. 
ey, “ cane them nk I recognized a Monotis it ee:sccse me ——. 
known in asia weil ta iaemaeraerie Be 
