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 

 ^SSScSlb of this University on thettird page of the cover of this issue 



Those marked "Supply exhausted" can not be furnished at all, those 

 marked Supply small" can not be furnished separately; those marked 

 ^Supply large" will gladly be furnished to any of our exchanges who may 

 ■nped them to complete their files. , _ , . . 



Back numbers of the Kansas University Quarterly and Geological 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 Kans^ Uni- 

 versity Quarterly) is issued in parts at irregular intervals. One volume, 

 contaminrfrom 300 to 400 pages of reading-matter, with necessary 

 Zstrations™ issued each year The subscription price is $3 per volume. 

 Sanges with other institutions and learned societies everywhere are 

 soHciteo? ATl exchanges should be addressed to the LIBRARY OP THE UNI- 

 versity of Kansas. 



All communications should be addressed to 



The Kansas University Science Bulletin, 



Lawrence, Kan. 



EDITORIAL BOARD. 



W. J. BAUMGARTNER, Managing Editor. 



U. G. MITCHELL, Exchange Editor. 

 W. C STEVENS. 



F. E. KESTER. 



E. H. S. BAILEY. 



S. J. HUNTER. 



