No. 397.] FOOD SUPPLY IN STARFISH. I9 
ing stalks of hydroids. That the little starfish found here a 
natural and congenial environment was evident from their 
healthy appearance, their quick response, and their rapid growth. 
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. They were kept under observation until November and fed on 
barnacles, small clams, and mussels. As they were examined 
from time to time, two features of their growth were espe- 
cially noteworthy, vzz., its rapidity and the difference in rate in 
