Sponges. 



Remarks on Classification Structure of a Sponge 

 J^aturalists who have contributed to the history of 

 Sponges Chemical nature of Sponge Interesting- 

 results Spongia qfficinalis and S. usta ^The Syrian 

 toilet Sponge Its high price Other Sponges Ob- 

 jects for the Aquarium Spongilla fluviatilis and 

 S. lucustris, or the fresh-water Sponges Sponges 

 common on the English Coast '-Their use in 

 Jtfedicine Sources of Iodine and Bromine Flints 

 and Agates, as owing their formation to Sponges 

 (Petrified Sponges (Practical details on the toilet 

 Sponge Sponge Fishery and Sponge J\fiar~kets. 



