THE FRESH-WATER AQUARIUM. a5 
heads in plenty, each new head springing from the base of 
a leaf on a long stalk. By separating these when pretty 
well grown, and removing the stem from the base, any 
number of new plants may be formed. If it be wanted to 
root at the bottom (as indeed is best) cut away the decayed 
portion of the base, and trim off every dark-coloured leaf 
and throw the plant in again. In a few weeks it will 
throw out roots, and it may then be attached to a stone 
VALLISNERIA SPIRALIS. 
by a piece of bass, and dropped in to fix itself where 
wanted, without in any way disturbing the tank. 
Starwort I have already spoken of, as a good purveyor 
of oxygen. It is a pretty plant of a delicate green hue, 
which appears on the surface of brooks and ditches every- 
_ where, both in this country and all over the continent. 
At a little distance it has so much the appearance of duck- 
