INDUCTION D'UNE QUEUE ET DE PARAPODES SURNUMERAIRES PAR DEVIATION DE L'INTESTIN CHEZ LES NEREIDAE (ANNELIDES POLYCHETES)

Abstract

Localized ablation of the intestine has been performed on normal and grafted specimens of the 2 polychaetes Nereis pelagica L. and Perinereis cultrifera G. with the following results: In the absence of the intestine, segments are not regenerated but parapodia grow on the plane of section. A segmented tail arises where the intestine is deviated; the regenerate obtained in this case is of the 'aneurogenic' type and without anal cirri and parapodia.