REGENERATION IN ANNELIDS
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FIG. 18. Eisenia foetida unicolor. Absence of ectomesodermal regeneration after
amputation of the first seven segments permanently deprived of the old nerve cord.
Condition of the worms operated after 4, 8, 14 and 21 days. For further explanation, see
Fig. 17. C, Cicatricial diaphragm; Oe d, oesophageal diverticulum; R Oe: oesophageal
regeneration bud. (Avel, 1961.)
F2
A.M.4