Deux exemples d’application des critères d’âge chez la Loutre, Lutra lutra (Linnaeus, 1758)

A collection of skulls of the Common Otter from western France was studied and compared with skulls of the same species from Denmark and the Netherlands. No significant differences were found. Age and sex composition of the three collections are given. Lutra lutra angustifrons Lataste, 1885, was based on comparison of the skull of a fullgrown Otter from Algeria with the skull of a juvenile Otter from France. Most probably this subspecies (syn. Lutra lutra splendida Cabrera, 1906) does not differ from the nominate subspecies.