Regeneration . the ends of thenerve-cords do not unite. Subsequent regeneration from one or fromboth components generally takes place in the region of union. It is more difficult to unite pieces of different species of worms,yet Joest has succeeded also in making combinations of this union between the anterior end of LumbriciLS nibelliLS and theposterior end of AllolobopJiora terrestiis was permanent, and the newworm reacted as a single individual, and lived for eight piece retained its specific characters, and showed no influence ^ See Joests Fig. 14. GRAFTING AND REGENER
Regeneration . the ends of thenerve-cords do not unite. Subsequent regeneration from one or fromboth components generally takes place in the region of union. It is more difficult to unite pieces of different species of worms,yet Joest has succeeded also in making combinations of this union between the anterior end of LumbriciLS nibelliLS and theposterior end of AllolobopJiora terrestiis was permanent, and the newworm reacted as a single individual, and lived for eight piece retained its specific characters, and showed no influence ^ See Joests Fig. 14. GRAFTING AND REGENERATION 173 of the other component. By means of a similar experiment we havea way of finding out if one component can influence regenerationtaking place from the other piece. Although Joest made only a fewobservations of this sort, the results show that no such influence ismanifested. By means of grafting it is possible to keep ahve small pieces of aworm that would otherwise perish. For instance, pieces of a worm. ^C.^^-
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