THE RÔLE OF THE BASAL PLATE OF THE TAIL IN REGENERATION IN THE TAIL-FINS OF FISHES (<i>FUNDULUS</i>AND<i>CARASSIUS</i>)

Abstract

1. By picking out the fin rays instead of cutting anterior to them, it is shown that ray stumps are not necessary for regeneration in the tailfins of fishes. 2. When the stumps are removed it seems that the new rays appear under the influence of the articulating portion of the basal plate of the tail. 3. From the embryological development and mode of regeneration a similarity is demonstrated between morphogenesis of limbs of Amblystoma and the tails of fishes, each being a self-differentiating mesenchymal system.