Vol. XLI. July, iQ2i. No. I 



BIOLOGICAL BULLETIN 



THE MARINE BIOLOGICAL LABORATORY 



TWENTY-THIRD REPORT; FOR THE YEAR 1920. 

 TWENTY-THIRD YEAR. 



I. TRUSTEES (AS OF AUGUST, 1920) i 



II. ACT OF INCORPORATION 2 



III. BY-LAWS OF THE CORPORATION 3 



IV. THE TREASURER'S REPORT =; 



V. THE LIBRARIAN'S REPORT 9 



VI. THE DIRECTOR'S REPORT n 



Statement 1 1 



1. The Staff 17 



2. Investigators and Students 20 



3. Tabular View of Attendance 26 



4. Cooperating and Subscribing Institutions 27 



5. Evening Lectures 28 



6. Members of the Corporation 29 



I. TRUSTEES 



EX OFFICIO. 



FRANK R. LILLIE, Director, The University of Chicago. 

 OILMAN A. DREW, Assistant Director, Marine Biological Laboratory. 

 D. BLAKELY HOAR, Treasurer, 161 Devonshire Street, Boston, Mass. 

 GARY N. CALKINS, Clerk of the Corporation, Columbia University. 



TO SERVE UNTIL 1924. 



H. H. DONALDSON, Wistar Institute of Anatomy and Biology. 



CASWELL GRAVE, Washington University. 



W. E. GARREY, Tulane University. 



M. J. GREENMAN, Wistar Institute of Anatomy and Biology. 



GEORGE LEFEVRE, University of Missouri, Secretary of the Board. 



A. P. MATHEWS, The University of Cincinnati. 



G. H. PARKER, Harvard University. 



C. R. STOCKARD, Cornell University Medical College. 



