| During an intensive survey of the littorinid fauna of the Belgian coast, five species were recorded alive, viz. <i>Littorina littorea, L. saxatilis, L. obtusata, L. mariae</i> and <i>L. neglecta</i>. The latter two of these are new to the Belgian fauna, but they occur only in very restricted populations. <i>L. obtusata</i> shows a local distribution, whereas <i>L. littorea</i> and <i>L. saxatilis</i> are both very common. For each species occuring in Belgium, detailed information on distribution, habitat and polymorphism is provided. Finally some topics for further research are outlined. |
