The human settlement of Corsica: Palaeogeographic and tectonic considerations

There are no marks of human settlement in Corsica during the Paleolithic age. This paper is a reflection on the following question: could Man have come to this island before the Neolithic age? The possibilities of the existence of an emerged region between Corsica and the mainland are considered.The Quaternary fauna suggests that an isthmus was possible during the Early Würm, unless the animals in the würmian sediments had come into the island previously.The bathymetry around Corsica shows that the shallowest region is between Corsica and Tuscany, via Capraja, Elba, Pianosa islands. But this sea bottom is deeper than the lower levels known or estimated for glacio-eustatical regressions during the Quaternary era. Thus, emersion of this region should have required tectonical movements. The neotectonic is known in Corsica and in perityrrhenian regions; the present bathymetry of the area which may have been emerged should be explained by movements of a credible rate.     

Reisolamento di una rara specie di Lievito: Trigonopsis variabilis Schachner

Zusammenfassung Trigonopsis variabilis, bisher erst einmal isoliert (1929), wurde in einem Traubenmost aus dem Weinbaugebiet des Staates S. Paulo, Brasilien, wieder aufgefunden. Es wird sein morphologisches und physiologisches Verhalten unter verschiedenen Kulturbedingungen beschrieben.     

Synaptonemal complex analysis in a human male carrier of a 4;6 translocation: heterosynapsis without previous homosynapsis

Summary Silver-stained synaptonemal complexes in surface-spread pachytene nuclei from a man, heterozygous for a reciprocal translocation, were analysed by electron microscopy. Contrary to the classically expected cross-shaped configuration, extensive non-homologous pairings were observed with asymetrical association in the lateral elements of the non-homologous arms of the quadrivalents. A possible role of the heterosynapsis in reproductive failure is discussed.