178 CARNEGIE INSTITUTION OF WASHINGTON. 



architecturally attractive, and the Director's visits to Oxford and 

 Cambridge have assured him of the cordial support of the best trained 

 English investigators as well as those of our own country. 



Such a laboratory in Jamaica could be maintained for less cost than 

 one in our own country and could be open throughout the year for the 

 reception of investigators. Indeed, the rapid improvement of Jamaica 

 as a health resort and as a center of awakened commercial and social 

 activity renders it possible to establish there a marine laboratory that 

 may attain in the western world to the position held by the Naples 

 Station in the advancement of science in Europe. 



With the exception of Dr. Tashiro, all the investigators at Tortugas 

 came to continue or to complete researches commenced in past years, 

 the idea being, in so far as possible, to complete the studies at Tortugas 

 before assuming new researches at Jamaica. 



Dr. Stanley C. Ball served as draftsman in making colored drawings 

 of the Eunicidse for Professor Treadwell's research upon these worms, 

 which has now been pursued for four seasons, 210 figures having been 

 completed. The artistic excellence of this work, in connection with the 

 thoroughness of Professor Treadwell's observations, should result in 

 the production of a pubhcation comparable with the beautifully illus- 

 trated systematic monographs of the Naples Laboratory. 



Of Dr. Paul Bartsch's interesting work we have already spoken, and 

 also of that of Dr. T. Wayland Vaughan. 



Dr. Louis R. Gary carried out an extensive study upon regeneration 

 in Cassiopea, finding that if the marginal sense-organs be present the 

 early stages of regeneration are much more rapid than if they be 

 removed. He also showed that this is not due to the movements of 

 the medusa, for when the sense-organs are removed and a circuit wave 

 maintained in the subumbrella tissue, regeneration occurs at the same 

 rate as when the sense-organs are removed, and, on the other hand, if 

 the sense-organ be prevented from initiating pulsation by the action of 

 magnesium, regeneration is still more rapid than if they be removed. 



In another research, Dr. Gary separated the calcareous spicules from 

 the fleshy and horny substance of gorgonians and found that 20 to 

 35 per cent of the weight of these forms is due to the spicules, and thus 

 the gorgonians actually contribute more calcium carbonate to the reef 

 limestones than do the madreporian corals. 



Professor Eugene W. Gudger continued his study of the anatomy of 

 sharks and rays, finding one species new to the Florida region. He also 

 dissected many teleosts, discovering much that has hitherto been unde- 

 scribed in their anatomy, and, in connection with Professor Longley, 

 he identified many species of reef fishes of the Tortugas. 



Professor W. H. Longley continued his study of the cecology of the 

 reef fishes, with a view to throwing light upon the causes that have 

 influenced the color patterns of these often brilliantly colored animals. 

 He found that certain of the conspicuously colored yellow, blue, and 



