THE FEESH-WATEE AQUARIUM. 



49 



cinak). This plant is an inhabitant of running- water— I 

 have not been able to make it grow well in the still water 

 of an Aquarium; but yet, have kept ic alive for some 

 time by rooting it very deep in the mould at the bottom ; 

 besides, I find that snails are very partial to it, and will 

 leave the- conferva and other plants in order to devour it. 

 I propose to arrange the plants in the following man- 

 ner: first, those used as centre pieces and for the purpose 

 of ornament ; second, those planted on rockwork out of 

 the water and not flourishing when submerged ; third, 

 those submerged and planted at the bottom ; and, fourth, 

 those floating without any attachment. 



Common Arrowhead. 



I. ORNAMENTAL PLANTS XOT AERATORS OF THE WATER. 



Common Arrowhead (Sagittaria sa gilt '/ folia.) Tins is 

 decidedly the best plant for a centre piece and can be 



