Female and young snails aquatic species Viviparus viviparus, the only species in which the female gives birth rather than lay eggs. The young develop in the shell of the mother. She died after the young people have left. Here young people were found dead (and their natural color) in the shell of the mother also died (because up out of the water with the surlaquelle branch it was fixed). There were two more young, but the shell was broken. Found in Lille on the edge of the Haute-Deûle on a part where the barges no longer circulate.