In another series of experiments, a short piece was cut from the basal
end of a long piece (three to four centimetres) and brought forward and
grafted in a reversed position on the anterior end of the same long
piece (Fig. 49, _A_). Of five unions of this sort, one produced a
hydranth in each component, neither being reversed. Another of the
pieces produced a hydranth partly out of each component (and at the same
time another at the aboral end of the large piece). The other two pieces
produced a single hydranth, a part of which came from the minor
component and appeared before the aboral hydranth on the aboral end of
the larger piece. This last result shows that the small piece from the
basal end has been affected by the oral end in such a way that it
develops more rapidly than it would have done had it remained a part of
the basal end.
In a third series of experiments a short piece (about a half of a
millimetre) was cut from the anterior end of a long piece (one and
five-tenths to two centimetres) and grafted _in a reversed position_ on
the posterior end of the same long piece (Fig. 49, _G_). In four cases a
hydranth developed only at the oral end of the long piece and none from
the aboral end or from the short piece. Eight unions produced, however,
in the region of the graft, a hydranth formed partly by each component.
Later another hydranth developed at the oral end of the larger piece.
The latter results are not convincing, but they may show that the small
piece has hastened the development of the hydranth at the aboral end.
Public-domain text, read in full here on John Shaqi.
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