148 MARINE AQUARIA FOR ROOMS. 



are then given off, and next spring many of these 

 may sprout into a healthy vegetation.* 



It should be remembered, however, that in a parlour 

 tank, small or large, there will not be sufficient aeration 



Fig. 1 08. 



" Irish Moss " (Chondrus crispns). 



produced by sea-weeds, unless the number of animals 

 is very few. To assist in this most important end, a 

 fountain, constructed like that in Fig. I, may be ad- 

 vantageously used. Some people content themselves 



* In the Crystal Palace and other aquaria, some species of sea- 

 weeds have spontaneously made their appearance from spores. Mr. 

 Saville-Kent thinks that the larger sea-weeds might be grown where 

 the rapid circulation of the water produces a strong current. 



