Freshwater Sponges, Hydroids & PolyzoaNote AF — GLOSSARY OF TECHNICAL TERMS USED IN PART I.Reading editionStebbing, J. Linn. Soc. xxx, p. 40; Annandale, Rec. Ind. Mus. i, p. 279.◇Copy noteReturn to GLOSSARY OF TECHNICAL TERMS USED IN PART I.