DEPARTMENT OF MARINE BIOLOGY. 



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supplied with coastal water, for the excess of calcium reduces the free 

 CO2 which is highly poisonous to most marine larvse. The reduction 

 of CO2 is characteristic of those parts of the West Indian region 

 wherein the surface-water is charged with a colloidal precipitate of 

 CaCOs due to bacterial action, as determined by Drew, Kellerman, and 

 Smith. 



The following 14 investigators studied under the auspices of the 

 Department of Marine Biology during the year: 



The season in Florida extended from May 15 to the end of July, 

 and the Tortugas Laboratory was visited by 8 investigators, not 

 including the Director. In addition, Professor Harvey was sent to 

 Japan and Professor Treadwell to Bermuda under the auspices of the 

 Department, while Doctors Clark and Mortensen studied at Tobago. 



