200 Objects for the Microscope. 



found in rocky pools hanging like a little bottle with a 

 circle of silvery spiculse round its mouth. 



Spicules of Pachymatisma (crutches). 

 Halichondria incrustans. 

 Griffithsia. 



Dysidea fragilis. 

 Tethese. 



Spongila3 fluviatilis. 

 Geodia. 

 Sponge Spicules, Thames. 



Serk. 



Pin-shaped. 



,, Parallel-spined. 



Anchor-shaped. 



Truncated. 



,, Clubs. 



Stars. 



Sponges from the Phillippine Islands. 



