634 The American Naturalist. [July, 
town. Asshown in the adjoining figure, the building is, at 
the ends, three storied. On the ground floor is the general 
aquarium room, well-supplied with local marine fauna, and 
open to the public. The laboratory proper is upon the 
second floor, divided into eleven compartments, the work 
places of the students. A series of small tanks passes down 
the middle of the room. In the western end are the library, 
. Ale Be TB: Bie 
BRITISH MARINE LABORATORY, PLYMOUTH. 
(August, 1892.) 
the museum, the chemical, photographic and physiological 
rooms. In the eastern are the living quarters of the director. 
The water supply of the laboratory is contained in two small 
reservoirs directly between the building and the fortifications. 
Each reservoir contains 50,000 gallons, and the water supply 
is carried throughout the building by gas engines. Tidal 
aquaria are in constant use for developmental studies of marine 
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