of Ocean-weeds 



We have had to do in the last chapter with 

 small carbonate-of-lime building jelly-specks. 

 We shall have to do in the next chapter with 

 carbonate-of-lime building jelly-polyps. But 

 there are also little vegetable -growths in the 

 sea which form carbonate-of-lime, and some of 

 these add their quota to the work of rearing 

 Coral-reefs. 



We have to do in the present chapter with 

 small flint-building vegetable-growths. But there 

 are also little animal jelly-specks in the sea which 

 form flint. 



So neither Carbonate-of-lime nor Flint can 

 be spoken of as belonging only to Animal or 

 only to Vegetable Life. They must both be 

 described in general terms as the outcome of 

 that which Lives. 



Amone other Flint-builders in the ocean are 

 the Radiolarians ; living jelly-specks, and makers 

 of the most exquisite shells, so tiny in size that 

 millions of them may be packed into one cubic 

 inch. These belong to the Animal Kingdom. 

 They rank with the Foraminifera, differing 

 from them chiefly in the fact that their shells 

 or skeletons are formed of silica, not carbonate- 

 of-lime. 



But in this chapter we are concerned with 

 151 



