NOTICE TO EXCHANGES. 
The attention of learned societies and other institutions 
which exchange scientific publications with the University of 
Kansas is called to the list of publications of this University on 
the third and fourth pages of the cover of this issue. 
Those marked “Supply exhausted” cannot be furnished at 
all; those marked ‘Supply small” cannot be furnished sep- 
arately ; those marked “Supply large” will gladly be furnished 
to any of our exchanges who may need them to complete their 
files. 
Back numbers of the Kansas University Quarterly and Geo- 
logical Survey, as far as possible, will be sent to those of our 
newer correspondents who are able and willing to reciprocate. 
ANNOUNCEMENT. 
The Kansas University Science Bulletin. (continuation of 
the Kansas University Quarterly) is issued in parts at irregu- 
lar intervals. One or more volumes, containing from 300 to 
400 pages of reading-matter, with necessary illustrations, is 
issued each year. The subscription price is $3 per volume. 
Exchanges with other institutions and learned societies every- 
where are solicited. All exchanges should be addressed to the 
LIBRARY OF THE UNIVERSITY OF KANSAS. 
All communications should be addressed to 
THE KANSAS UNIVERSITY SCIENCE BULLETIN, 
LAWRENCE, KAN. 
EDITORIAL BOARD. 
W. J. BAUMGARTNER, Managing Editor. 
H. E. JORDAN, Exchange Editor. 
S. J. HUNTER. 
W. C. STEVENS. 
W.S. HUNTER. 
0. O. STOLAND. 
