22 BRITISH HYDROID ZOOPHYTES. 



Jelly-fish hatches her eggs, then 

 called "planulse." The freed bud, or 

 jelly-fish, after seeing something of the world 

 of waters around it, may, in the ease of a 

 female, settle down, attach itself to some 

 object, and ultimately give birth to a family, 

 the members of which sooner or later disperse. 

 They do not, however, in this, the larval 

 stage, resemble either the polypite or their 

 immediate parent the jelly-fish, but are little, 

 flat, conical bodies called planulre, which, in 

 their later stages, enclose a cavity and swim 

 by means of cilia. 



"Planula" is modified into a 

 polypite. Later on they attach themselves 

 to some object by their larger end, which 

 expands and divides into root-like filaments. 

 A mouth and tentacles are formed at the 

 upper end and the result is a polypite, similar 

 to that which originated the colony. These 

 polypites will then proceed to carry out the 

 principle of continuous budding, and thereby 

 form fresh colonies. 



First method of dispersal. '* Repro- 

 ductive " bud bodily transported. This 

 is one method by which the ova are 



