KTJNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 63. N:0 7. 45 



Description of plates. 



The numbers on the left of the figures give the numbers of the setigerous segments; the numbers on the 

 right give the magnification. 



»Glands» indicates that the epidermal glands, stained with iodine green, are given in the figures referred to. 



Notoproctus pacificus. 



1. Anterior region seen from the right side. Natural colour. 7:1. 



2. Cephalic plate. Natural colour. 7: 1. 



3. Rear end seen from above. Glands. 6: 1. 



4. Rear end seen from the left side. Glands. 6: 1. 



Nicomache personata. 



5. Anterior region seen from the left side. Natural colour. 8: 1. 



6. Anterior region seen from above. Natural colour. 6: 1. 



Leiochone johnstoni. 



7. Anterior region seen from above. Glands. 14: 1. 



8. Anterior region as far as the 10 th setigerous segment inclusive. Glands. 4: 1. 



9. Posterior part of 7 th setigerous segment and the whole of the 8 th setigerous segment from above. Glands. 4: 1. 



10. The 8 th setigerous segment, cut open in the dorsal middle line and folded out. Glands. 8: 1. 



11. Anterior region, from the right, of an abnorma! individual (No. III in the table, p. 15). Glands. 8: 1. 



12. Posterior region from the 19 th setigerous segment inclusive, seen from beneath. Glands. 10: 1. 



13. Anal cone, cirri, etc, seen from the right side. Glands. 6: 1. 



Leiochone leiopygos. 



14. Anterior part including anterior portion of l st setigerous segment, seen from above. Natural colour. 6: 1. 



15. Part of head from the right side. Ocelli. 7: 1. 



16. Anterior region as far as the 9 th setigerous segment. Glands. 4: 1. 



17. 8 th setigerous segment, cut open in the dorsal middle line and folded out. Glands. 6: 1. 



18. 8 th setigerous segment from above. Glands. 4: 1. 



19. Posterior region as far as the 23"^ setigerous segment inclusive, seen from the right side. Glands. 9: 1. 



Praxillella gracilis var. borealis. 



20. Head from above. Glands. 18: 1. — Trieste. 



21. Posterior portion seen from the left side. Glands. 12: 1. — Trieste. 



Praxillella praetermissa. 



22. 6 th setigerous segment from above. Glands. 4: 1. 



23. 6 th setigerous segment from beneath. Glands. 4: 1. 



Clymenella rubrocincta. 



24. Head from above. Glands. 9: 1. — Pleasant Beach. 



25. Head from beneath. Ocelli. 9: 1. — Pleasant Beach. 



K. Sv. Vet. Ältad. HandL Band 63. N:o 7. G* 



