230 THE AMERICAN NATURALIST. 
A little later currents of water bearing granules were seen to 
flow in active streams from one leaf to the other.” 1 
In this case it appeared as if the sarcostyles served to hold 
the edges of the leaves together while the permanent connec- 
tion was being established, after which the sarcostyles loosened 
their hold and retracted into their respective nematophores. 
U G. Memi Notes on Plymouth Hydroids. Journ. Marine Biol. ASSOC., 
February, 1896, p 
