



g DEPARTMENT OF COMMERCE 



a BUREAU OF FISHERIES 

 Jj^ HUGH M. SMITH, CommUftlon«r 



1 







PROGRESS IN BIOLOGICAL INQUIRIES, 1921 







REPORT OF THE 

 DIVISION OF SCIENTIFIC INQUIRY FOR 

 THE FISCAL YEAR 1921 







By R. E. COKER 



Assistant in Charge of Scientific Inquiry 







APPENDIX VIII TQ THE REPORT OF THE tJ. S. COMMISSIONER 

 OF FISHERIES FOR 1921 







^^^^ 







BureauofFi8heriesDocumentNo.dll 







PRICE, 5 CENTS 



Sold only by the Superintendent of Documents, Govetmnent Printing 

 Washington, D. C. 



WASHINGTON 

 GOVERNMENT PRINTING OFFICE 

 1922 







