138 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 
The periodical publications of the station are Contributions from 
the Naples Zoological Station, Fauna and Flora of the Gulf of Naples, 
and The Zoological Yearbook. 
Although this is primarily a station for biological research, an 
important feature is the aquarium, which is justly celebrated for the 
beauty of its installation and the healthy condition of the exhibited 
animals. The aquarium is one of the leading attractions of Naples 
and is much resorted to by visitors and by the local population. The 
price of admission to the aquarium is 2 franes, except on Sunday 
afternoons, when it is 1 frane, and on special occasions, when it is half 
afrane. The income from this source is about $8,000 annually. 
The grotto arrangement of the aquarium is unconventional, and the 
general impression made on the visitor is novel and pleasing. The 26 
large tanks with large glass fronts are skillfully lighted from above, 
no light reaching the aquarium room except that which comes through 
the water. As one stands before the tanks and sees the groups of 
healthy, contented fishes and invertebrates, with nothing neglected 
that contributes to the naturalness of their environment, one easily 
fancies he is at home with the animals on the sea bottom. 
The salt water required for the aquarium (and laboratory) is retained 
in large subterranean reservoirs; if is supplied through a closed 
circulation and is renewed only as needed to replace losses due to 
evaporation and leakage. Owing to the care exercised in feeding the 
animals and to the ‘‘ balance” which has been established, it is rarely 
necessary to cleanse the aquarium tanks. The water reaches the 
aquaria from a nozzle with a contracted aperture about a foot above 
the surface, and the jet carries considerable air with it; this form of 
aeration is regarded as quite essential for the health of the animals 
and renders a direct air circulation unnecessary. The water supply- 
ing each series or line of tanks runs from one to another by means of 
a surface gate and discharges into the reservoirs under the building, 
so that there is a current in each tank, which is considered quite 
necessary. 
Seaside laboratory at Conecarneau, France.—Mention should be 
made of a visit to the laboratory at Concarneau, France—one of the 
many small seaside laboratories and biological schools maintained by 
the French marine department. At this institution, in the center 
of the great sardine fisheries of Brittany, some important biological 
and fish-cultural work is being done under the direction of Dr. 
Eugéne Biétrix. An interesting adjunct of this station is a ree- 
tangular stone pound or inelosure (vivier) constructed many years 
ago by M. Guillou, for the experimental rearing of lobsters. The 
pound is very extensive, with eight compartments in which the tide 
flows; is built of granite and sehist, and cost 130,000 franes. It was 
the first of the kind in France, and is still used in part for the same 
purpose as lobster pounds are on the coast of Maine. In view of the 
attention now given to lobster-rearing in the United States, and the 
