EXPLANATION OF PLATE VII. 



Fig. 1. Halicornaria bailey i, Bale. 

 Fig. 2. Halicornaria, furcata, Bale. 

 Fig. 3. Halicornaria intermedia, sp. nov. 

 Proximal end of hydrocladium. 

 Fig. 4. Halicornaria intermedia, sp. nov. 

 Distal portion of hydrocladium. 

 Fig. 5. Halicornaria urceolifera (Lamarck). 



The specimen figured is of the maximum width ; the 

 hydrocladia are usually narrower, often no wider than 

 those of H. furcata. 



Fig. G. Halicornaria birostrata, sp. uov. 

 Figs. 1-6 x 80. 



