MORPHOGENESIS 



783 



provoke reorganizational activities as far-reaching as those which occur 

 at the time of division. 



Taylor and Farber (1924) removed small drops of endoplasm from 



Figure 180. Regeneration in Uronychia uncinata. A, shallow marginal incision which 

 did not injure any of the motor organelles, the healing of the wound was not accom- 

 panied by cell reorganization; B, deep incision not involving motor organelles, fol- 

 lowed by complete reorganization ; C, excision involving the large posterior cirri, fol- 

 lowed by complete reorganization; D, excision of anterior portion, including several 

 membranelles, followed by complete reorganization. (From Taylor, 1928.) 



Euplotes patella without producing serious structural changes through 

 dedifferentiation, although death invariably occurred within two to three 

 days, if the micronucleus was taken out. In this and a good many other 

 species, shallow marginal incisions, or wounds from small excisions, heal 



