12 M. FOSLIE. CALCAREOUS ALGÆ FROM FUNAFUTI. [1900 No. 1] 



It is also an important reef former". It forms an irregular mass 

 anastomosed with divers small Corals and other animals, and in 

 the main only represents the lower branch-systems of a large spe- 

 cimen. The branches are coarser and more irregular than in any 

 of the above specimens, but as fully agreeing in structure with 

 these, it is most probably to be considered a coarse form of the 

 present species. 



