395 



But the most interesting results are those from pièces 

 eut lengthwise unsymmetrically. The formation of the hydranths 

 takes place in many cases under thèse conditions ;in the middle 



Sil 



■vy» 





m 



m 

 m 



% 





m:é 



Fi- 9. 



Fig. 10. 



Fig. 11. 



of the length of the stem. Four days after the opération I could 

 see near the thinner région of the stem, ahnost in the middle 

 of its length. a much thickened part which gives the impression 

 of a small vesicle (fig. 9. a). After one hour the tentacle „Anla- 

 gen" appeared at the base of tbis vesicle which remains in con- 



Bulletiu III. 3 



