DEPARTMEXT OF MARINE BIOLOGY. I23 



scopus, the "star gazer,"' the eye muscles of which develop into electrical 

 organs capable of giving a severe shock. Professor Dahlgren is making a 

 study of the histolog}' of these muscles in various stages of growth, and it is 

 expected that his work will be pursued for several years before being ready 

 for publication. 



During April and Alay 191 1, the Director, together with G. Harold Drew, 

 Esq., B. A., of Christ's College, Cambridge, and E. E. Reinke, Esq., of 

 Princeton University, went to Jamaica and established a temporary labora- 

 tory at Port Royal, While in Jamaica much kindness was shown us by the 

 Honorable Mr. Johnstone, Acting Colonial Secretary of the colony, and by 

 Dr. H. H. Scott, Director of the Hope Laboratory, and on behalf of the 

 Department I have pleasure in expressing our gratitude to these gentlemen. 



Finally, the yacht Anton Dohrn having been completed in a most thorough 

 and satisfactory manner, we steamed out from ^liami on June 3 and went at 

 once to Tortugas, whither Messrs. Drew and Vaughan had preceded us. We 

 remained at Tortugas until August 7, after which the Director went to 

 Woods Hole and to Halifax, Nova Scotia, to continue physiological studies 

 commenced this year at Tortugas. In this connection it is a pleasure to 

 thank Prof. Frank R. Lillie, Director of the Marine Biological Laboratory 

 at Woods Hole, for kindly placing the facilities of the laboratory at our 

 disposal. 



The following investigators have pursued researches under the auspices of 

 the laboratory during the year : 



Dr. L. R. Carj-, of Princeton University; January 191 1 and June 26 to August 7. 



Prof. Ulric Dahlgren, of Princeton University; February 1910. 



G. Harold Drew, Esq., B. A., Christ's College, Cambridge ; April 20 to June 30. 



Dr. E. Newton Harvey, Princeton University; June 26 to July 28. 



Dr. Merkel H. Jacobs, University of Pennsylvania; July i to 28. 



Prof. William H. Longlev, collector and investigator, Goucher College; June i to 



July 28. 

 E. E. Reinke, Princeton University; April 20 to May 25. 

 Dr. T. Wayland Vaughan, U. S. Geological Survey; June i to 30. 



In addition to the above. Dr. Stewart Paton came to Florida intending 

 to study the relations between the earliest movements of the heart and the 

 correlated condition in development of the nervous system in the embryo of 

 the loggerhead turtle, C. caretta. Before reaching Key West, however, he 

 was threatened with illness, which obliged him to forego his research at Tor- 

 tugas. The material for the research was, however, collected for him by 

 Dr. Longley, and it is hoped that he may be able to proceed with his studies. 



Dr. Cary continued his studies upon the growth of gorgonians, and other 

 problems which he discusses in his preliminary report published herewith. 



G. Harold Drew, Esq., carried out observations which justify the belief 

 that he has probably discovered one of the most interesting facts yet revealed 

 through the study of oceanography. He finds that the most abundant ba- 

 cillus at depths between 10 fathoms and the surface in the ocean off Jamaica 

 and Tortugas is a form that possesses the capacity to convert all the nitrates 



