144 



REPORTS OF INVESTIGATIONS AND PROJECTS. 



according to observation, from 5 to 12 days, and that one planitla of Pontes 

 astreoides was free for about 7 days. This year I can add Agaricia crassa, 

 2 to II days, and Pontes clavaria, 4 to 13 days. This duration of the free- 

 swimming larval stage renders possible a very extensive distribution of these 

 organisms by ocean-currents. It is intended to extend the rearing experi- 

 ments to all species of which young can be procured. 



The Planting of Collectors. 



Hoping that young corals might be obtained by judiciously planting col- 

 lectors, series of tiles with no young attached were planted on each of the 

 three reefs off the northwest shore of Loggerhead Key — 24 tiles were planted 

 on the northeast reef, 25 on the middle reef, and 12 on the southwest reef. 

 These collectors will be observed from year to year, and it is hoped may fur- 

 nish material for growth observations and transplanting experiments. 



A SUMMARY OF THE RESULTS ACHIEVED BY THE LABORATORY 

 DURING THE FIVE YEARS 1905-1909. 



During these first five years of its existence 29 investigators have studied 

 under the auspices of the Laboratory, and among these 10 have paid two or 

 more visits to the station, and thus 44 visitors have come to the Laboratory 

 for the purpose of investigation ; 30 papers have been published by these in- 

 vestigators as a result of their studies, and in addition 12 papers have been 

 produced by the Director, bringing the total output of papers up to 42. This 

 enumeration does not include papers presented for publication or now in 

 press, or preliminaries published in the Year Books of the Institution. 



The following table will serve to give an idea of the scope of these re- 

 searches and of their places of publication : 



