Published in Revue Suisse De Zoologie, in 1950, in volume 57, pages 1-12

Published in Revue Suisse De Zoologie, in 1950, in volume 57, pages 237-316

Published in Revue Suisse de Zoologie, in 1950, in volume 57, pages 559-563

Published in Revue Suisse De Zoologie, in 1950, in volume 57, pages 621-686

Published in Revue Suisse de Zoologie, in 1950, in volume 57, pages 687-756

Published in Revue Suisse de Zoologie, in 1950, in volume 57, pages 757-767