I20 REPORTS 01? INVESTIGATIONS AND PROJECTS. 



water, thus giving an ant-proof area most desirable for certain experiments. 

 A new windmill was installed especially to pump pure sea-water into the 

 aquarium tanks, and improvements were also instituted by virtue of which all 

 refuse is quickly carried far out to sea, thus preventing the possible introduc- 

 tion of typhoid, dysentery, or other diseases which are a menace to the major- 

 ity of tropical places. 



For the production of the best work in research it is essential that students 

 be surrounded by things attractive as well as interesting, and indeed a large 

 measure of the success of the Naples Laboratory is due to the unrivaled 

 beauty and historic fascination of all that surrounds it. It is exceedingly dif- 

 ficult to maintain many plants upon a small island every grain of the soil of 

 which is but the fragment of some marine shell or coral, and over which the 

 spray dashes in clouds in every storm ; yet it is the hope of the Laboratory to 

 one day surround the buildings by a garden which will render the station at- 

 tractive to botanists as well as to zoologists. 



The following investigators studied under the auspices of the Department 

 of Marine Zoology during the past season : 



Dr. R. P. Cowles, Johns Hopkins University, June 26 to July 22. 



Mr. Davenport Hooker, Yale University, July 10 to 22. 



Professor Edwin Linton, Washington and Jefferson College, June 26 to July 17. 



Dr. J. F. McClendon, Missouri University, June 11 to July 8. 



Dr. Raymond C. Osburn, Columbia University, June 4 to 27. 



Dr. Charles R. Stockard, Cornell Medical College, May 19 to June 17. 



Professor W. L. Tower, Chicago University, May 12 to 13. 



Dr. T. Wayland Vaughan, U. S. Geological Survey, April 15 to May 13. 



Mr. W. S. "Wallace, assistant, May 15 to July 28. 



Apart from the articles which have been contributed by investigators to the 

 two volumes of researches now in press, the following papers have been pub- 

 lished elsewhere during the year: 



Jacob Reighard, Michigan University : The photography of aquatic animals in their 

 natural environment. Bulletin U. S. Bureau of Fisheries, vol. 27, pp. 41-68. 



Charles Zeleny, Indiana University: The effect of degree of injury, successive injury, 

 and functional activity vipon regeneration in the Scyphomedusan Cassiopea 

 xamachana. Journal of Experimental Zoology, December, 1907. 



H. E. Jordan, University of Virginia : The accessory chromosome in Aplopus mayeri. 

 Anatomischer Anzeiger, Bd. 32, pp. 284-295, 1908. 



R. Hartmeyer, Natural History Museum, Berlin, Germany: Reisebilder aus Westindien 

 mit besonderer Beriicksichtigung der Korallenbildungen. Deutsch. Gesell. 

 fiir volkstiimliche Naturkunde, 1908. 



Alfred G. Mayer, Carnegie Institution: A plan for increasing the efficiency of marine 

 expeditions. Science, vol. 27, April 24, 1908. Also : Marine laboratories and 

 our Atlantic coast. American Naturalist, vol. 42, p. 533. Also : The cause 

 of pulsation. Popular Science Monthly, December, 1908. 



Dr. Zeleny finds that the medusa confirms his law that the animal with the 

 greater amount of removed tissue regenerates at a more rapid rate than the 

 animal with the lesser amount of removed tissue. Also, that functional 

 activity or inactivity has no apparent effect upon the rate of regeneration. 

 Dr. Stockard's more recent researches also support these conclusions. 



