130 



ZOOPHYTE S. 



M;idrepora. Madrcpora. Madrepora. Madrepora. Madrepora. 



Carbonate of lime, 

 Phosphates and fluorides, 

 Organic matter, 



Carbonate of lime. 

 Phosphates and fluorides, 

 Organic matter, 



Carbonate of lime, 

 Phosphates and fluorides, 

 Organic matter, 



Carbonate of lime, 

 Phosphates and fluorides, 



Organic matter, 



"A portion of the massive shell of a large Chama, treated in a similar manner, afforded 

 for 10(1 [.arts the following result: 



Carbonate of lime, . 

 Precipitate by lime-water, 

 Organic matter, 



97-007 

 2-600 

 0-398 



" The amount of organic matter is here very small ; while the precipitate by lime-water 

 is large. The examination of other shells with reference to this point, would have been 

 highly interesting, and had it fallen within the scope of these researches, the subject 

 would have been farther investigated. 



" The per-centage of phosphates and fluorides in the above analyses, after excluding 

 the organic matter, is as follows : 



