METHODS OF DISPERSAL. 23 



transported, viz. : by the mother-bud freeing 

 herself from the colony and bearing the brood 

 away to another place, and thus establishing a 

 new centre of distribution. 



Second method. Bud remains 

 attached, ova set free. The reproductive 

 buds in this case remain attached to the 

 parent, fertilization takes place, and the ova 

 (planulae) are set free, disperse, and go through 

 the same modifications as the planules of the 

 detached buds, preparatory to establishing 

 fresh colonies in the same manner. 



"Select" and "Reproductive" 

 buds nearly obliterated. The buds styled 

 " select " and " reproductive," demand some 

 further remarks. In many cases, their real 

 identity as originating in distinct buds is 

 almost wholly lost, and it is difficult to recog- 

 nize any trace of bud unless it is known that 

 a solution of the difficulty is to be found 

 in certain links or intermediate forms. We 

 will, therefore, set those interested in such 

 matters at once on their guard. Hincks calls 

 attention to these gradations, and his work on 

 the Hydroids should be consulted by all who 

 desire to study this group of animals. 



