214 THE “WORED ORT TLIC E SEA. 
yielding surface of the mud. It must not be supposed that the 
whole of the work is completed when the piles are driven, and the 
wicker-work run between them—that then the mussels attach 
BOUCHOLEUR IN HIS ACON,. 
themselves, and the fishers have nothing to do save to gather those 
which are full grown. Experience has taught that the process 
of development is greatly aided by moving the mollusks from one 
a 
ISOLATED POSTS COVERED WITH YOUNG MUSSELS, 
position to another, positions in which they are successively exposed 
for longer periods to the air. The spat, with which the water of 
the bay is filled during February and March, collects on isolated 
