Figure 13. A composite diagram of the centrifuged oocyte of Pectinaria after GV breakdown

The stratified particles were stained by different vital dyes, fluorochromes and cytochemical tests. The three zones of the unstained centrifuged egg (A, B and C) are indicated, beginning with zone A at the centripetal pole.

  1. Fat droplets
  2. Lipid granular cap
  3. Granular band I
  4. Hyaline zone with diffuse granules
  5. Cortical granules
  6. Granular band II, mitochondria and protein yolk
  7. Dense protein yolk
  8. Centrifugal vacuole with basophilic granules

(From Tweedell, 1962).