During the breeding season, the seminal vesicles of the Indian hedgehog secrete an amorphous material and crystalloid bodies. The latter are absent in the non-rutting period. The amorphous secretion of the rutting, as well as of the non-rutting, seminal vesicles show identical histochemical reactions in containing mucoproteins, mucopolysaccharides and appreciable amounts of alkaline phosphatase. The crystalloid bodies are complexes of glycolipids and mucoproteins and, unlike the amorphous secretion, they show an intense acid phosphatase activity. Although progressive development of the crystalloid material in the apical cells of the seminal vesicle epithelium has not been seen, there is similarity of these cells to the crystalloid bodies located in the lumen. The secretion of these crystalloids seems to be dependent upon the hormonal status of the animal. While they are present in the seminal vesicles of hedgehogs treated with male goat pituitary extracts in the non-breeding season, they cannot be demonstrated in the seminal vesicles of a control group.
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