THE MARINE AQUARIUM. ed, 
a well managed tank, Infusoria are sufficiently abundant to 
provide them with all they require, and food not eaten | 
soon decays, unless speedily removed. Crabs and prawns | 
positively require feeding, and Madrepores may be fed for _ 
amusement. Small fragments of the lean of raw meat | 
should be given, or the flesh of a cooked prawn, and twenty- 
four hours afterwards, the undigested morsels should be 
removed. 
The Syphon is a simple affair enough. In using it, 
place the short end below the surface of the water in the 
tank, and apply the mouth to the longer end, and draw 
till the water flows; it will then continue to flow as long 
as the short end is kept under water. If you object to 
promote aquarian science by means of suction, first fill 
the syphon with water, and apply a finger to each end, 
and so turn it over, and withdraw the fingers when the 
short end is dipped beneath the surface of the water in the 
tank. Mr. Lloyd’sells a syphon expressly for the purpose, 
which the aquarian should possess. 
Purchase of Specimens.—There are now many dealers 
in Aquarian stock, but very few of them supply marine 
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