584 



GABRIELE KASS-SIMON 



exists for the three levels of the non-budding controls. (See Figure 7.) Two out of 

 12 animais did not regenerate, but formed a second set of buds at the site of 

 amputation. In both cases the second bud did not split off from its parent, but 

 remained attached to the mother animal above the peduncle, despite the forma- 

 tion of basai plates. 



SCALE 



■ ONE REGENERATED ANIMAL 



□ ONE NON-REGENERATED ANIMAL 



|_ hours 24 48 72 96 120 144 168 

 N10 



ri . i □ 



i . . i i . i i » i ■ . i » 1 1 t 1 1 i i i i i i - 



hours 24 48 72 96 120 144 168 



Fig. 8. 



Time of tentacle differentiation of day-old and week-old budding animais 

 compared to day-old and week-old animais transected at 50 %. 



2. Comparison of week-old budding and non-budding animais eut at 50 % 



The data are summarized in Table 8. The TDT's are significantly différent for 

 budding and non-budding animais (t=6.2, p < 0.01). The différences in FTN's, 



WEEK OLD 

 ANIMALS 



