DEPARTMENT OF COMMERCE 



BUREAU OF FISHERIES 



HUGH M. SMITH, Commissioner 



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 TO THE REPORT OF THE U. S. COMMISSIONER 



OF Fisheries for 1921 



Bureau of Fisheries Document No. 911 



PRICE, 5 CENTS 



Sold only by the Superintendent of Documents, Government Printing Office 

 Washington, D. C. 



WASHINGTON 

 GOVERNMENT PRINTING OFFICE 

 1922 



