In two of my previous papers (SHINO, 1951, 1951a), I reported five species of the Tanaid crustaceans occurred in the shore waters at Seto. Here I describe three more species which have been added to my collection from this locality afterwards. Of these, one appears to represent the type of a new genus of the family Tanaidae, being characterized by the possession of appendages much simplified in their structure. The other two are also new to science and can apparently be designated to the genus Apseudes of the family Apseudidae. They are remarkable for the fact that they have come from the littoral zone, while the majority of the forms belonging to this genus was discovered from the sea-bottom, if not abyssal in habitat
