NINTH VANNUAL REPORT. o7 
will be provided in the spring. These can readily be arranged 
in small aquaria placed at intervals on the coping of one of the 
floor pools. 
Manatees —The Manatee or sea-cow obtained in September, 
1903, was lost five months later from pneumonia, when the build- 
ing became cold through belated work on the skylights. Two 
more manatees, male and female, were procured in June, 1904. 
They were taken in Lake Worth, Florida. The young male died 
at the end of eight months. Many of its internal organs were 
infested with flat-worm parasites, some of which perforated the 
membranes of the brain and caused its death. The larger speci- 
men, the female, was eight and one-half feet long when received. 
The manatee feeds freely on eel-grass (Zostera) and becomes 
very tame, raising the mouth from the water for food. When 
the local supply of eel-grass failed in January the manatee was 
fed on lettuce and celery tops. While the male lived the pair 
kept close together both when active and at rest. 
During the first three months of her captivity the large female 
turned on her back each day when the water was drawn from the 
pool. This practice has been abandoned entirely, the animal 
now rests belly down, in the empty pool, with the front end of 
the broad nose applied close to the floor. In water manatees 
rise to breathe at intervals varying from five to eight minutes, 
and do not increase the number of respirations when out of water. 
When stranded they are comparatively helpless, making lateral 
movements only, and these with considerable effort. 
The accompanying photographs show the utmost height to 
which the female has raised her head above water in reaching 
for food, even when hungry. The young male never raised his 
head so high above the surface. All three manatees followed 
the attendant around the pool at feeding time, swimming very 
slowly. Their movements were always deliberate. 
Fish Hatchery.—Vhe United States Fisheries Bureau supplied 
the Aquarium, during the winter, with fish-eggs from Govern- 
ment hatcheries. The hatchery was tn operation throughout the 
fish hatching season, and the young fish derived from it were 
turned over to the New York Fish Commission for planting in 
State waters. The exhibit was of constant interest to visitors. 
It showed, in various. stages of development, the eggs and young 
of the Atlantic, landlocked and quinnat salmon; the rainbow, 
brook, lake, and brown trouts, and the Lake Erie whitefish. 
Numerous specimens of all these species were retained at the 
Aquarium, for exhibition purposes, and there is now a good col- 
