OF SOUTH AUSTRALIA. 
39 
This species is identical with C. Sonderi F.v.M., described nine years 
after Sonder had published C. obscura. Sonder’s specimens were very 
small and dense growing, while Mueller’s were most typical of the plant. 
Harvey identified the two as the same thing. The species must bear the 
name C. obscura, given to it by the earlier founder on account of its dark 
green colour. 
Caulerpa trifaria Harvey. 
This species has not been recorded from South Australia but it is here 
included for comparison. 
Fig. 20 . — Caulerpa trifaria. 
