96 INTRODUCTION TO POLYZOA. 



Reproduction. There are two methods 

 of reproduction obtaining, one method asexual, 

 the other sexual. 



Asexual reproduction. The asexual 

 method, or process of producing permanent 

 buds, results in the formation of colonies 

 (colony budding), each bud being connected 

 with its parent by a thread or network of 

 threads derived from the cellular layer of 

 tissue lining the body-cavity, and by the 

 protective cuticle and its epidermis. In a few 

 instances, the body-cavities of adjoining 

 polypides are openly connected. In many 

 cases, the polypide cells of a colony are more 

 or less distant from one another, each polypide 

 being connected by a stem-like prolongation 

 (Stolon). In other cases the polypide cells 

 abut upon one another more or less compactly. 

 Colonies are formed either over running 

 objects, adhering to them, such as shells, 

 stones, seaweed, etc., or growing erect and 

 branching, thereby producing plant-like 

 structures, with either cylindrical or laminar 

 stems and branches. In the families 



Selenariidse of CHEILOSTOMATA and Cristatellidse 



