4. THE MITOCHONDRIA The mitochondria in the early stages form a juxta-nclear mass in the same way as the Golgi bodies do. [...] We are of opinion that both the Golgi bodies and mitochondria in the early stages of development of the oocyte occupy the area generally known as the idiosome or yolk-nucleus of Balbiani. [...] As might be expected the yolk bodies lie at the top the cytplasm in the middle and the mitochondria at the bottom. [...] 4. The mitochondria also grow and multiply in the Winsome area and later on become distributed in three zones in the egg—the perinuolear the medullary and the cortical. [...] A.- The Function and the Structure of the Zona Pellueida in the Ovarian Egg of Turtles.
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