The Zoologist — November, 1873. 3755 



employment of three other attendants, and I can bear my willing 

 testimony to the great intelligence and unvarying civility of those 

 now employed. 



The pumped-iip water flows, as I have said, into tanks 9 and 10, 

 half into each ; the stream pumped into tank 10 passes to the 

 right, — an aperture having been purposely left in each party 

 wall, as these divisions might be called, — into No. 11, thence 

 into No. 12, and so on until it reaches No. 18 a; here it passes 

 beneath the corridor or pathway (j J j), called the " Attendant's 

 Gallery" in the "Key to Plan," and flows into tank 60 ; thence it 

 turns to the left, through an earthenware pipe, into tank 59, and 

 so on through tanks 58, 57, 56, 55, 54, 53, 52, 51 and 50, into 

 tank 49, where it falls through a cylinder into the dark tank below. 

 A second stream, also pumped up from below, falls into tank 9, 

 and thence passes to the left into tank 8, and thence into tanks 7, 

 6, 5, 4, 3, 2 and 1, whence it crosses under the corridor (j) into 

 tank 39, and then turning to the right through tanks 40, 41, 42, 43, 

 44, 45, 46, 47 and 48, finally plunges into the cylinder in tank 49, 

 and there, uniting with the stream I have traced from the right 

 hand, returns to the great abyss below, thence again to be pumped 

 up, when its turn shall arrive, into tanks 9 and 10, and pursue the 

 same course as before. The arrows in the plan show the direction 

 which the stream is continually taking. The animals in the tanks 

 numbered 1 to 18 A are intended to be viewed laterally from the 

 saloon (g g f). I have already explained that the sides of these 

 tanks facing the saloon are of plate-glass, and therefore the animals 

 can be seen as perfectly as if yon were in the sea in a transparent 

 diving-bell : the other row of tanks 39 to 60, is intended for reserves, 

 not open to public inspection : this reserve is very necessary, as 

 casualties by death must of necessity occur now and then : all these 

 forty tanks are on the left or west side of the saloon which is 

 entirely devoted to the public. On the east of the saloon are two 

 apartments (h and i) containing respectively nine and eleven tanks ; 

 the whole of these tanks, numbered 19 to 38 inclusive, are very 

 shallow, open at the top, and of a convenient height for viewing 

 the animals vertically, or dorsally, for that is a better term, since 

 we look down on their backs. The water is here circulated much 

 in the manner I have described in those on the west side of the 

 saloon, but the stream is smaller and less rapid : it passes under 

 the floor of the saloon in both instances, into apartment h by means 



