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Fig. 1.21 Oogenesis and extraembryonic nutrition during brooding in
Beania bilaminata . ( A , B ) Brood-sac wall with adjoining early ( A ) and
late ( B ) embryo ( arrows indicate dark granules ( A ) and pale vacuoles
( A , B ) in cells of the placental analogue (embryophore)) ( inset shows
ovary with non-mature vitellogenic oocyte). Abbreviations: bc brood
cavity, bw basal wall, bz brooding zooid, е embryo, f follicle cells, is
intraovarian space, o oocyte, ov ovary-wall cells, pl placental analogue
(embryophore). Scale bars: A , B , 20 μm; inset , 10 μm
Figures
Fig. 1.21 Oogenesis and extraembryonic nutrition during brooding in
Beania bilaminata . ( A , B ) Brood-sac wall with adjoining early ( A ) and
late ( B ) embryo ( arrows indicate dark granules ( A ) and pale vacuoles
( A , B ) in cells of the placental analogue (embryophore)) ( inset shows
ovary with non-mature vitellogenic oocyte). Abbreviations: bc brood
cavity, bw basal wall, bz brooding zooid, е embryo, f follicle cells, is
intraovarian space, o oocyte, ov ovary-wall cells, pl placental analogue
(embryophore). Scale bars: A , B , 20 μm; inset , 10 μm
Figures