Data were cclleoted from one group of
four animals with young oocytes, having a diameter after fixation
of 45-55 p0 A seoond group consisted of tissue from three animals
with large oooytes of a fixed cell diameter of 80-110 v. From
eaoh animal 3 to 5 analyses were run and the mean values are
given in Table I, It can be seen that for the young oells there
is in all oases a striking similarity between the nuoleolar and
oytoplasmio RRA. For the older oells, on the other hand, the
nucleclar RIUA oompoeition differs markedly from that of the
cytoplasm, although in no case to the extent found by Vinoent
(1952). Rucleoplaemio RlfA is very unlike that of the other