Fig. 34. 



Twf) Prop water rrnnatiili<l Colonies, adaptod l)y the long stalk to lifting 

 \\\r {Kilyps alx^vo the smothering ooze in which the basal part is em- 

 U'diird. From sprcimrtis. Umlx;llula, to the left, has an apical tuft of 

 |»olvps. more or less jiendent at the tip of a stalk which may be over a 

 yard in length in large sj^ecies. The other colony, Stachyptilum, is more 

 or less rigid, and bears its polyps in a less concentrated series. 



i 



