Note sur la biologie du pétoncle. (chlamys varia L.)

The scallop (Clamys varia L.) is a mollusc whose biology is very little known. In this note, we summarized its bionomy and indicated the specific characters differentiating it from other similar bivalves. We especially specified an important point: The growth of its shell. It is indeed on the shell that all the stages of the mollusc's life are written. As a consequence, it is of a great interest to be able to interpret, in a practical way, the growth areas, which provide some useful information on the age and edible value of the animal. Our study material has been collected on the Flotte bank (Isle of Ré) at different times of the year, in order to have all the evolution stages.