Abstract
A histochemical study has been made of degenerating eggs and interstitial gland cells in the ovaries of Branchiostoma (amphioxus) at the prespawning stage. Such ovaries show several degenerating mature ova which differ from the corpora atretica of vertebrates in that there are no follicle cells or their derivatives. However, the stromal elements from the periphery invade the degenerating eggs which show lipids consisting of neutral fats (triglycerides) and are gradually resorbed; there is no storage of cholesterol and/or its esters at any stage of their regression, suggesting they do not form steroids. The interstitial gland cells of thecal origin, described previously in the ovaries of vertebrates, do not develop in the ovary of amphioxus.
Published Version
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