164 CARNEGIE INSTITUTION OF WASHINGTON. 



Professor Tennent will continue the studies upon the control of 

 dominance in echinoderms, which he has been pursuing at Jamaica 

 and at Tortugas. Dr. Harvey will continue the work upon the 

 relation between cell penetration and stimulation, which he began at 

 Tortugas. Dr. Clark will continue his well-known work upon echino- 

 derms and their development, and it is hoped he will produce another 

 of his authoritative memoirs upon this group . Dr. Potts will study the 

 worms, and the Director will study the temperature reactions of corals 

 and the embryology of certain forms, as suggested by Dr. Vaughan, 

 and also the medusae Siphonophora and Ctenophora. Some physi- 

 ological investigations will also be continued and others commenced. 



In addition to the four who have gone on the Australian expedition, 

 the following-named investigators studied at Tortugas: 



Dr. Paul Bartsch. U. S. National Museum, Washington, April 25 to May 7. 



Dr. L. R. Gary, Princeton University, September 1 to October 15. 



Mr. R. B. Dole, U. S. Geological Survey, June 9 to IS. 



Dr. A. J. Goldfarb, College of the City of New York, May 29 to June 28. 



Prof. E. W. Gudger, State Normal College, North Carolina, May 29 to June 28. 



Mr. K. S. Lashley, Johns Hopkins University, April 26 to June 28. 



Prof. W. H. Longley, Goucher College, Baltimore, May 26 to June 28. 



Dr. E. E. Reinke, Princeton University, May 29 to June 28. 



Prof. A. L. Treadwell, Vassar College, May 29 to June 28. 



Dr. T. Wayland Vaughan, U. S. Geological Survey, May 19 to June 13. 



Prof. John B. Watson, Johns Hopkins University, April 26 to June 13. 



Mr. Stanley C. Ball, artist, Yale University, May 29 to June 28. 



Attention should be called to the fact that conditions at Tortugas 

 have changed in a manner adverse to the welfare of the laboratory. 

 The United States Navy has finally abandoned Fort Jefferson, and 

 thus our only means of communication with the mainland is cut off, 

 and it now becomes necessary for the Anton Dohrn to make at least 

 one trip each week between Key West and Tortugas. This seriously 

 interferes with the employment of the yacht in her more important 

 capacity as an adjunct to the scientific equipment of the laboratory. 

 Moreover, these trips are very expensive, owing to the greatly in- 

 creased cost of gasoline and to the necessity for hiring additional men 

 in order that the laboratory may not be short-handed when the 

 yacht is absent. It is thus almost impossible to find time in which 

 the yacht may be used for oceanographic studies, pelagic work, and 

 dredging, for which she is especially well designed. 



In the opinion of the Director, these difficulties can best be met by 

 gradually abandoning the Tortugas as a site for our principal land 

 station and establishing a laboratory upon Jamaica. Such a labo- 

 ratory could be maintained for very much less expense than the 

 present station at Tortugas, and could be kept open throughout the 

 year. This would permit the Anton Dohrn to be used exclusively 

 upon an oceanographic and zoological cruise each year, while our 

 Jamaica laboratory could depend upon the launches we already 

 possess to supply it with material for its studies. Jamaica has been 

 constantly becoming more and more accessible during the past ten 



