Lake Ma.rinknckce, Physical and Biological Survey 



which they have so generously extended. Their kindly co-opera- 

 tion has added materially to the attractiveness and value of this 

 report. 



To Dr. Evermann, Mr. Clark and their collaborators is due 

 praise and honor for the work. It is truly a scientific classic and 

 without peer in its field. 



RICHARD LIEBER. 

 Director, The Department of Conservation. 

 April 7, 1920. 



