86 THE WORLD OF THE SEA. 
which produces a new polype, and so on. This succession deter- 
mines the length of the stem. Each apparent flower throws out a 
A CAMPANULARIA 
(Campanularia dichotonia.) 
small tube in which it terminates, and each addition adds one more 
joint to the axis, which it thus increases in length. 
The Yudbularia ramea is an animal production of the most 
