Demonstration of a change in the frequency of the characteristic "gonadal atrophy" as a function of the rank of egg-laying in Drosophila melanogaster]

The frequency of gonadic atrophy of Drosophila melanogaster depends on the day of emergence. This variation is related to the rank of egg-laying, the eggs laid down during both first days giving imagoes with a gonadic atrophy more often.     

Disparition de la 5-hydroxytryptamine dans les granulations des glandes de la peau deDiscoglossus pictus et deRana temporaria après injection de réserpine

Summary 30 min after an intraperitoneal injection of reserpine (5 or 10 mg/kg) in the frog (Rana temporaria) and in the toad (Discoglossus pictus), a substance which has the properties of 5-hydroxytryptamine (argentaffine reaction, azoreaction, indoreaction and fluorescence in U.V. after formaldehyde) disappears from the skin glands; the histochemical reactions are more positive again 1 1/2 to 2 h after the injection of reserpine.     

Description of the folliculo-stellate cells in the anterior hypophysis of the monkey Macacus irus]

Folliculo-stellar cells are present in the anterior lobe of hypophysis of the monkey Macacus irus. These cells limit strait cavities in which one can observe microvillosites at the apical pole of the cells. The folliculo-stellar cells possess long and thin fibers which insert themselves between different types of granular cells and sometimes extend to the peri-capillar regions. Numerous organelles are present in these folliculo-stellar cells, especially microfilaments.