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, and James Johnstone, B.Sc. Lond. With 11 Plates. 7s. net.

9. Chondrus. By Otto V. Darbishire. With 7 Plates. 2s. 6d. net.

10. Patella (the Common Limpet). By J. R. Ainsworth Davis, M.A., and H. J. Fleure, B.Sc. With 4 Plates. 2s 6d. net.

11. Arenicola (the Lug-Worm). By J. H. Ashworth, D.Sc. 8 Plates. 4s. 6d. net.

12. Gammarus. By Margaret Cussans, B.Sc. 4 Plates. 2s. net.

13. Anurida. By A. D. Imms, B.Sc. (Lond.). 7 Plates. 4s. net.

14. Ligia. By C. Gordon Hewitt, B.Sc. 4 Plates. 2s. net.