a clear, deep crimson-lake, well preserved in drying. Substance membra- 

 naceous, but soon softening in fresh-water. The plant closely adheres to 

 paper in drying. 



A pretty little species of Wrangelia, with the aspect of a small 

 specimen of the European W. midtifida, but differing from that 

 species in several essential characters : particularly in the sharp- 

 pointed or mucronate ramuli. By this latter character it agrees 

 with W. mynopliylloides, and W. mucronata, but differs by se- 

 veral others ; nor is it likely to be confounded with any other 

 Australian species. W. crassa and its allies, which externally 

 somewhat resemble it, have very obtuse ramelh. 



Fig. 1. Wranqelia nitella, — tJie natural size. 2. Frustule of a branch, 

 showing the main articulations and their whorled ramelli. 3. Part of a fertile 

 ramellus. 4. Parts of same : — the latter figures variously magnified. 



