5. Alcyonium. By Sydney J. Hickson, M.A., D.Sc., F.R.S., Beyer Professor of Zoology in Owens College, Manchester. With 3 Plates. Price 1s. 6d. net.
6. Lepeophtheirus and Lernea. By Andrew Scott, Resident Fisheries Assistant at the Peel Hatchery. With 5 Plates. 2s. net.
7. Lineus. By R. C. Punnett, B.A., with 4 Plates. 2s. net.
8. Pleuronectes. By Frank J. Cole, Jesus College, Oxford, Lecturer in the Victoria University, Demonstrator of Zoology, University, Liverpool, and James Johnstone, B.Sc. Lond., Fisheries Assistant, University, Liverpool. With 11 Plates. 7s. net.
9. Chondrus. By Otto V. Darbishire, Owens College, Manchester. With 7 Plates. 2s. 6d. net.
10. Patella (the Common Limpet). By J. R. Ainsworth Davis, M.A., Professor of Zoology in the University College of Wales, Aberystwyth, and H. J. Fleure, B.Sc., Fellow of the University of Wales. With 4 Plates. 2s. 6d. net.
11. Arenicola (the Lug-Worm). By J. H. Ashworth, D.Sc., Lecturer in Invertebrate Zoology in the University of Edinburgh. With 8 Plates. Price 4s. 6d. net.
12. Gammarus. By Margaret Cussans, B.Sc., Zoological Department, University of Liverpool. With 4 Plates. 2s. net.
13. Anurida. By A. D. Imms, B.Sc. (Lond.). With 7 Plates. Price 4s. net.
14. Ligia. By C. Gordon Hewitt, B.Sc., Demonstrator in Zoology, University of Manchester. With 4 Plates. 2s. net.