PLATE III. 



Fig. 1. — Fibril teased from the protoplasm of Actiuosphaerium showing the 

 alveoli at the angles. 



Fig. 2. — An emulsion permeated with fibrils showing how the form and 

 arrangement of the alveoli is conditioned by the presence of the fibers. 



Fig. 3. — A part of the above emulsion without fibers. 



Fig. 4. — Protoplasm of Actiuosphaerium. 



Figs. 5, 6, 7. and S. — Fibrillae of the pseudopods of Actiuosphaerium. 



