8 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



vessels suitable for certain animals or special investigations. 



The gable wall opposite trie door is fitted up with 

 shelving upon which a small collection of preserved 

 animals illustrating the Fauna of the Bay is arranged. 

 On the side opposite the windows, between the tanks, 

 we have also placed narrow glass cases in which dried 

 specimens, such as Zoophytes, Polyzoa, Mollusca and 

 Crustacea, can be conveniently displayed. It is certainly 

 an advantage for visitors that we should have a certain 

 amount of such museum material properly labelled con- 

 stantly on exhibition, as the living animals in the tanks 

 and aquaria are always a somewhat uncertain quantity — 

 at one time, after a successful dredging expedition, they 

 maybe abundant and very interesting, at another, if there 

 has been no recent collecting, or after some accident when 

 a number have died, there may be comparatively few or 

 they may be nearly all common shore animals. Hence 

 the Committee are glad to be able to state that Mr. G. W. 

 Wood has kindly offered them his considerable collection of 

 Manx Invertebrata, which was exhibited at the Douglas 

 International Exhibition last year. When this arrives it 

 will be displayed in a suitable manner on the shelves round 

 the walls of the Aquarium. 



The arrangement of pipes for allowing the sea-water to' 

 circulate is as follows (see PI. IV) : — From the sea the 

 water is brought to the well, in which by screwing down 

 the valve at high tide it can be stored. The pump, worked 

 by a small water-motor supplied with fresh water from 

 the pipes of the town, then forces the sea-water from the 

 well into one division of the cistern ; and, after depositing 

 any sediment, the water passes into the second division 

 from which leads the supply pipe to the tanks. The double 

 cistern is built on a platform of the cliff behind the house, 

 and on a level with the roof, so as to be above the highest 



