FOURTH WEEK] June 153 



an anemone may draw in its tentacles without apparent 

 cause, and after a few minutes expand more widely than 

 ever. Suddenly a movement of the mouth is seen, and it 

 opens, and one, two, or even a half-dozen tiny anemones 

 shoot forth. They turn and roll in the little spurt of 

 water and gradually settle to the rock alongside of the 



PLEUROBRACHIA. 



mother. In a short time they turn right side up, expand 

 their absurd little heads, and begin life for themselves. 

 These animal " buds " may be of all sizes; some minute 

 ones will be much less developed and look very unlike 

 the parent. These are able to swim about for a while, 

 and myriads of them may be born in an hour. Others, 

 as we have seen, have tentacles and settle down at once. 



