In a small collection of sponges obtained during the winter of 1930–31 at Plymouth, six specimens were found which are of special interest. Four of these have proved to be new to the locality, the fifth was new to British waters, and the sixth was found to be a new species. Those species new t o the Plymouth area are Gellius angulatus (Bowerbank), Pachymatisma johnstoni Bowerbank, Eurypon clavatum (Bowerbank), and Halichondria firmus Bowerbank. The latter is the first example of the species to be recorded since it was first described forty years ago. The species new to the British waters is Reniera aquœductus Schmidt, and the new species Pseudaxinella alleni n.sp.