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ELIZABETH AUGHEY

Summary.

Chemical analysis of adult cat prostate shows that zinc is present in significant amounts. Attempts to demonstrate the zinc at cell level using dithizone give indeterminate results. From autoradiographs, the zinc is scattered throughout the cell but concentrated in the apical area, along the luminal surface, and free in the lumen. Electron micrographs of the acinar cell show secretory granules agreeing with the grain distribution of the autoradiograph. Previous histochemical findings gave a similar position for non-specific acid phosphatase and 5-nucleotidase. It is suggested that zinc is an integral part of the secretion of the cat prostate, and associated with the production of metalloenzymes.

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ELIZABETH AUGHEY

Summary.

The presence of a disseminate prostate is described in the red deer stag. The glands are divided into cranial and caudal groups on a histochemical basis; the cranial glands are considered to produce a mucoprotein and fat, the caudal glands a glycolipid. The latter are affected by season, and hence by the endocrine status of the stag, only becoming active during the rut when the testicular interstitial cells are active. The cranial glands are only minimally affected by season.

The histological and histochemical changes in the seminal vesicle of the pre-rutting and rutting deer stag are described. The presence in the secretory epithelium of the rutting red deer stag seminal vesicle of a complex carbohydrate, phospholipid and fat is shown.

The testicular interstitial cells show marked variations from a fibroblast appearance in the pre-rut to a highly reactive cell in the rut.

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Elizabeth Aughey and P. S. Orr

Summary. A defect affecting 90% of the spermatozoa of an infertile man consisted of round heads and a loss of tails, probably caused by a developmental abnormality at the spermatid stage.