scribed by Agardh ; or whether it may not also be B. minor of 

 Sonder in PI. Preiss. It is exceedingly abundant on the shores 

 of Western Australia, particularly in K. G. Sound, where the 

 bottom of the harbour is in summer carpeted with it over large 

 spaces. The fronds vary a little in breadth, and the broader 

 ones show a tendency toward assuming the characters of D. 

 paniculata, and it is just possible that this may be an extreme 

 form of that plant. I have however very similar specimens from 

 widely separated localities. The tufts of hairs often formed 

 under the axils, are anomalous ; and the spores (?) here figured 

 are perhaps antheridia. 



*»• 



Fig. 1. Dictyota furcellata, — the natural size. 2. Portion of a branch. 3. 

 One of the tufts of jointed hairs. 4. Portion of the membrane, with two 

 spores (?) : — the latter figures variously magnified. 



