On four species of Pontoniinae (Crustacea, Decapoda, Palaemonidae,) found in Porifera inhabiting the coastal regions of Kyushu, Japan

It is well known that many prawns belonging to the subfamily Pontoniinae inhabit with certain marine invertebrates such as Porifera, Coelenterata, Mollusca, Echinodermata and Tunicata. In the present paper are described four pontoniid prawns including one new species, Periclimenaeus ohshimai, two new records to the fauna of Japan, Anchistioides compressus Paulson and Onycocaris yuadratophthahna (Balss) , and a known species, Periclimenaeus gorgonidarum (Balss), which are all commensal with Porifera. The specimens were collected in the shallows of Amakusa Islands, west of Kyushu and of Tsuyazaki, Fukuoka Prefecture, north of Kyushu in 1965 to 1966. According to Holthuis (1952), some species belonging to the following genera, Anchistioides, Onycocaris, Periclimenaeus, Periclimenes and Typton of the subfamily Pontoniinae have been recorded to accompany with Porifera, though the species of the Porifera have hardly been known. This time we were fortunately instructed about the species of Porifera by Dr. S. Tanita