NINTH ANNUAL REPORT. 101 



that a limited number of species do withstand it for considerable 

 periods, the renewal of the supply of sea fishes would be neces- 

 sary more frequently. 



The completion of the work on filters, now in progress, will 

 permit of the new reservoir for pure sea water being brought 

 into use, when immediate relief from troubles due to brackish 

 water may be expected. The long endurance, under these condi- 

 tions, of the species named below is very interesting zoologically : 



SEA FISHES FROM THE liERMUDA ISLANDS WHICH HAVE LIVED 

 FOR LONG PERIODS AT THE NEW YORK AQUARIUM, IN 

 WATER RANGING IN DENSITY FROM I.O16 DOWN TO I.OO5. 



Nassau grouper ( EpincpJic/iis sfriatits) 7 years. 



Gray snapper ( Liitiaiiiis grisciis ) 7 years. 



Spot snapper ( Xcoiiicnis syiiagrns) 6 years. 



Squirrel-fish , ( Holoccntnis asccncioiiis ) 5 years. 



Amber-fish { Scriola lalandi ) 5 years. 



Striped grunt ( Haciiiulou clcgans ) 5 yeai^s. 



Angel-fish ( AugclicJitliys ciliaris ) 5 years. 



Trigger-fish ( Balisfcs caroliiicnsis ) 5 years. 



Surgeon-fish ( Tciifhis hcpatns) 4 years. 



Green moray (Lycoduntis fnnehris) 4 years. 



Common rockfish ( Mycfcropcrca boinici) 4 years. 



Red hind ( Epincphchis gnttatus) 3 years. 



Yellow-tail ( Ocyiinis chrysiirus) }, years. 



STUDY OF FISH DISEASES. 



Like all institutions of the kind, the Aquarium suffers losses 

 of specimens from causes other than those attributable to a bad 

 water supply. As diseases of several kinds are common, arrange- 

 ments have been made recently for the pathological examina- 

 tion of all fishes dying in the Aquarium. All specimens lost, 

 from an}- cause whatever, are now sent to a physiological labora- 

 tory for examination. The fishes are fully labeled as to name, 

 locality, time kept in the Aquarium, and duration of disease. 

 These data, together with subse(|uent notes by the pathologist on 

 each specimen, will, it is believed, constitute a record of value to 

 aquarists, and lead to more successful management of fishes in 

 captivity. 



