II.
THE
EMBRYOLOGY
OF
ASCIDIANS
89
FIGS. 62 to 73. Migration and segregation of mitochondria during the development
of Phallusia. The mitochondria are segregated, after fertilization, in the yellow-crescent
and then in the muscle line (Reverberi, 1956).
This is fully shown by the early (Reverberi, 1931; Dalcq, 1932) and
recent merogony (Ortolani, 1958), and centrifugation (La Spina, 1958)
experiments. By merogony experiments, it has been proved again (by
Whatever the significance of the different endoplasmic constituents
might be, this significance is not yet present in the unsegmented egg.
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