[Body wall allograft reaction between 2 populations of worms (Lumbricus terrestris) from the same biotope origin but one of which lives in a different biotope].

Allografts which are practised between Lumbricus from the same biotope take ad libitum. Allografts are practised between two populations of earthworms from the same source one of which has lived in a new biotope for 12 years. Such allografts are attacked but never resorbed by the host.