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ROBERT CHAMBERS AND J. A. DAWSON. 



while intact, could be detected only because of its shimmering and 

 silvery outline. Suddenly, the membrane was seen to break up 

 into innumerable cilia beating out of unison. A few seconds later 

 the brilliantly lighted cilia disappeared as they fused into an 

 optically structureless membrane. 



b c 



FIG. 3. 



It is significant that the reconstitution of the membrane occurs 

 by a fusion which spreads from the bases of the cilia toward their 

 free ends. Three successive stages of this process are shown in 

 Fig. 3, a, & and c. This suggests the possibility of a slime-like 

 substance being secreted and spreading between and over the 

 cilia to join them into an optically homogeneous sheet. 



