EIGHTH ANNUAL REPORT. 



77 



The hatchery afforded a practical working exhibit of the proc- 

 esses of modern fish culture and was of constant interest to visit- 

 ors. School teachers visiting the Aquarium with their classes 

 found it useful for biological instruction. It should doubtless be 

 developed into a local school of fish culture, and can supply em- 

 bryological material for advanced students in the universities. 



Arrangements have been completed for continuing the hatchery 

 on the same basis during the coming year, and eggs of the Quin- 

 nat Salmon of the Pacific Coast have already been placed in it. 





v>>* i 



H. V. LETKEMAK*. 



ANGEL FISH. 



Rock-work in the Exhibition Tanks. — During the past year 

 nearly one-half of the exhibition tanks at the Aquarium have 

 been lined with rock-work, in order to exhibit the specimens with 

 more natural backgrounds. This treatment of the tanks has prov- 

 en satisfactory, and is an improvement on the original lining of 

 white tiles, which gave them a very monotonous appearance. 



A supply of coral rock was procured from the Bahama Islands, 

 and an attempt has been made to give the tanks the appearance 

 of grottoes like those occurring in the reefs about islands of coral 

 formation. 



A number of very good sea caverns have thus been constructed, 



