MIGRATION OF REPRODUCTIVE ORGANS IN HYDRA. 



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are developing. Those on the border line, often migrate towards 

 the buds but never reach them. That is, they remain on the 

 parent. The place occupied by the reproductive organs on the 

 completely formed bud is determined by their position in the 



FIG. i. Hydra with 5 buds and 13 spermaries. Spermaries have migrated 

 from parent to buds 2, 4 and 5. 



growth region (R-G) of the parent hydra at the time the bud 

 starts. 



Spermaries or ovaries found near the tip or center of the distal 

 end of the bud when it makes its first appearance, take up a 

 final position at the distal end of the completely formed bud 

 (Diagram A, 3). The spermary (Diagram A, 1-3) during the 

 different stages of progress in the development of the bud, 

 retains its same position with reference to the tip or distal end. 

 In Diagram A the bud became independent of the parent in 

 sixty hours after its initial stage of development. Diagram B, 



