144 MARINE AQUARIA FOR ROOMS. 



off a good deal of mucus when sickly, and poison the 

 water. The following species are the prettiest, and offer 



Fig. 102. 



Delesseria sanguined. 

 Fig. 103. 



Plocamium plumosum. 



a certain variety of colour and tint, which make an 

 aquarium look very pretty : Ulva, Callithamnion, 



