108 NEW YORK ZOOLOGICAL SOCIETY 



School for Teachers, Barnard College, Columbia University, 

 American Museum of Natural History and Packer Institute, 

 Brooklyn. 



Numerous living specimens of fishes and amphibians were 

 presented or loaned to the American Museum of Natural His- 

 tory, to be used as models in the preparation of mounted ex- 

 hibits. 



Improvements during the year were almost entirely con- 

 nected with the engine room and pumping plant. 



Additions were made to the supply of stored seawater in 

 the reservoir and several large glass plates in the exhibition 

 tanks were replaced. 



Considerable painting was necessary in the exhibition hall 

 of the Aquarium and the walls of the service galleries were 

 whitewashed. 



The large shipping tanks which are annually subjected to 

 more or less hard usage were renewed and additional tanks of 

 extra large size were constructed. An automatic stereopticon 

 was installed in the main exhibition hall and supplied with 

 slides illustrative of American fishery industries. 



Expenditures resulting from break-downs amounted to 

 much less than last year. 



The small library attached to the Director's office has been 

 rendered much more useful by the addition of numerous zoo- 

 logical works of reference. The most important acquisition 

 during the year was a full set of The American Naturalist. 



From May 1 to August 31, the Aquarium was kept open 

 until six o'clock in the evening. This was done without extra 

 cost and the public made full use of the extra hour of admission. 



For several months past Dr. G. A. MacCallum of New York 

 City has been making post-mortem examinations of the fishes 

 dying at the Aquarium. Dr. MacCallum is interested especially 

 in the study of the trematode parasites, and he has succeeded in 

 finding a number of entirely new forms. In the course of ex- 

 amination for these parasites a careful study of the causes 

 leading to the death of the fish is made. In many cases the au- 

 topsy discloses no extensive parasitism and no organic disease, 

 the fish often being in good condition as far as can be discerned. 

 Occasionally parasites are so abundant, especially when on the 

 gills, as to be the evident cause of death. In fact, it may be stated 

 that aside from the deadly fungus of the fresh-water fishes, 



