TENTH ANNUAL REPORT. 



107 



YELLOW PERCH. 



the Aquarium iij/2 years. During this time it had grown from 

 a length of lo inches and a weight of jl pound to 29^ inches 

 and a weight of 9J4 pounds. This fish was one of the very oldest 

 residents of the Aquarium. On May 14, 1894, this specimen with 

 54 others of the same species was placed in one of the large floor 

 pools, where 24 of the same lot still remain in good condition. 

 It is hoped that these fine specimens will live to grow still larger. 

 Another old resident, the large Mississippi catfish {Leptops oli- 

 varis), weighing 64 pounds, died April 25th, after living in the 

 Aquarium five years. Its weight had increased about one-third in 

 this time. These records are interesting as showing the growth 

 and length of life of aquatic animals in captivity. 



The Aquarium now has many species which have lived in the 

 building from five to eleven years. 



Specimens of aquatic animals lost during the year have been 

 distributed to the American Museum of Natural History, the 

 Museum of the Brooklyn Institute, the College of Physicians and 

 Surgeons, and to the Laboratory of the University of Pennsyl- 

 vania. 



Excellent photographs have been made of most of the species 

 living in the Aquarium. These are being published in the reports 

 and bulletins of the Society, while many will be used to illustrate 

 the Aquarium guide-book now in course of preparation. 



