Short Communication

Abstract

Resume L'auteur note la presence, pour la premiere fois, de Sphaerotrichia divaricata et Chorda filum dans l'etang de Thau (Herault-France) et discute le probleme de Fintroduction d'especes nouvelles dans cet etang. Abstract The Occurrence of Sphaerotrichia divaricata (C. Ag.) Kylin and Chorda filum (L.) Stackhouse in the Lagoon of Thau (Herault-France) Sphaerotrichia divaricata and Chorda filum are recorded in the lagoon of Thau (Herault-France) for the first time. The problem of the recent introduction of new species in this lagoon is discussed.