The cells of the stria vascularis of the guinea-pig have been studied morphologically and histochemically. The stria vascularis consists of three layers of cells with bloodcapillaries. Apart from some yellowish pigments, the only cytoplasmic inclusions seen in the living cells and in the fixed materials are numerous rod-shaped mitochondria and spherical lipid globules. The mitochondria are about 1.5 µ in length with a diameter of 0.8 µ they contain phospholipid. The lipid globules are about 1.0 µ to 1.5 µ in diameter; they contain phospholipid and a small amount of cerebroside.

The cytoplasm of these cells contains a small amount of diffused phospholipid and cerebroside.

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