EXPLANATION OF PLATES. 

 PLATE I. 



All the figures are of Dohus adus, parasite of haddock (Gadus wjlefinus). 



Fig. 1. Part of cyst lying between muscle fibres. Enlarged. 



2. Cyst lying among muscles from haddock, 38cm. long. Enlarged. 



3. ,, ,, ,, portion further enlarged. 



4. Larvae. Enlarged. 



5. Cyst from haddock, about 43 cm. long. Enlarged. 



6. Section of cyst in muscles. Enlarged. 



7. Spotted haddock, about 39 cm. long. Reduced. 



8. Detached chamber of cyst. Enlarged. 



9. Chamber of cyst. Enlarged. 



10. Larva from Fig. 6. Enlarged. 



11. A cyst extracted from among the muscles. Enlarged. 



12. A branched larva from Fig. 6. Enlarged. 



13. Theoretical diagram of formation of cyst, first stage of Fig. 175. 



14. Detached large chamber of cyst. Enlarged. 



15. Larva in two chambers. Enlarged. 



16. Appearance of cyst in muscles of haddock, about 43 cm. long. Enlarged. 



17. Larva, "1 mm. long, from kidney. It is the larva p. Fig. 19. Enlarged. 



18. Cyst from kidney. Enlarged. 



19. ,, ,, Enlarged. Size, x-y, "6 mm. 



20. Enlarged capillaries with larva; of parasite attached to the outside of 

 cyst in muscles. Enlarged. 



21. Parasite in kidney. Empty chnmber measuring "12mm. in diameter. 

 Enlarged. 



22. Branched capillary with larvae of parasite in muscles. Larva, '07 mm. 

 long. Enlarged. 



23. Branched larva observed in kidney. Enlarged. 



24. Four larvae which had left the cyst in kidney. Enlarged. 



25. Enlarged drawing of larva, a ., Fig. 24. Enlarged. 



26. Two larvaa in one cyst, kidney. Enlarged. 



27. Thick-walled translucent cell. Enlarged. 



28. Free-cells observed among the muscles, apart from the cyst. Enlarged. 



29. Group of cells (parasite in muscles). Enlarged. 



30. Parasite in kidney. Enlarged. 



31. Drawing to show the connective tissue coat of the capillary. Enlarged. 



32. Dark-brown body (b.) and little green granules (</.) observed close 

 together, and detached from any parasite in the tissue of the infected 

 kidney. Enlarged. 



33. Dark-brown bodies in infected kidney. Enlarged. 



34. Enlarged drawing of evacuated cyst in Fig. 30. 



35. A branched larva in the muscle. Enlarged. 



36. Small columnar body in muscle. Enlarged. 



