796 THE JOURNAL OF GEOLOGY. 
present European geologists familiar with this problem it is 
probably better to include the Permo-Carboniferous rocks of 
Kansas in the Permian series.‘ We see no decided objection to 
such a classification, while the appearance and the prominence of 
the Pseudomonotts fauna in the Neosho formation furnishes a 
strong reason on the biologic. side for such correlation. The 
Marion formation belongs to the undoubted Permian and contains 
only fossils which are characteristic of that series. 
CHARLES S. PROSSER. 
UNION COLLEGE, 
Schenectady, N. Y., July, 1895. 
* The classification of the Permian as a subdivision of the Carboniferous period or 
system is in accordance with the usage of the U. S. Geological Survey (See Tenth. 
An. Rept. U.S. Geol. Surv., p. 66). 
