288 
The Ohio Naturalist. 
[Vol. XI, No. 4, 
formation. Especial emphasis was placed on the distribution of 
the stratum, for this formation only appears in isolated areas. 
These isolated areas were formerly supposed to be the result of 
original deposition in separate basins, but the speaker was able to 
show that the isolation is due to the fact that the Maxville was 
originally a continuous deposit, which after being raised to a 
land surface was swept away in most places; the scattered rem- 
nants later being submerged to receive the Pottsville. 
In the northern part of the area of exposures it was shown 
that the formation consisted of a massive lower half separated from 
a medium bedded upper half by a nodular shale zone. 
The researches of the speaker resulted in increasing the fauna 
by 50% and the new forms clearly show the Maxville to have as 
its closest equivalent the Spergen Hill (Salem formation) fauna of 
Indiana. It was stated further -that Ulrich has shown this Spergen 
Hill fauna to recur in the Ste. Genevieve and Tribune limestones 
and hence it is difiHcmlt to say with which of these the Maxville is 
equivalent In the opinion of the speaker, after considering all 
available evidence, the nearest equivalent would be the upper 
member (Ohara) of the Ste. Genevieve limestone. 
The society adjourned immediately after the address. 
Bertram W. Wells, Secretary. 
Orton Hall, December 5th, 1910. 
The- meeting was called to order by the President, Dr. Dach- 
nowski. The minutes of the previous meeting were read and 
approved. The President then introduced Dr. Joseph A. Leighton 
who gave an interesting, and stimulating address on “Some Con- 
tributions of Biology to Philosophy.” Prof. Leighton pointed 
out the indebtedness of philosophy to biology showing in a num- 
ber of instances how biological conceptions have invaded and 
modified philosophical thought. Succeeding the address an 
interesting discussion was engaged in by the faculty members 
present. 
The latter part of the evening was taken up by reports of the 
Ohio Academy of Science meeting held at Akron during the 
Thanksgiving recess. Profs. Landacre, Osborn and Schaffner 
gave accounts of the papers presented and the work of the 
academy. 
A short business meeting ensued. Mr. W. G. Stover, Mr. 
C. H. Goetz, Miss Rose Gormly and Miss Mary B. Linnell were 
elected to membership. The society then adjourned. 
Bertram W. Wells, Secretary. 
Date of Publication, February 7, 1911. 
