PLATE XXVIII. 



Fig. 



1. Head of Harmothoe zetlandica, Mel. Enlarged. 



2. Head of Lagisca extenuata, Grube. Enlarged. 



3. Head of Harmothoe spinifera, Ehlers (olim Sibbaldii). Enlarged. 



4. Head of Harmothoe Ljungmani (=H. Macleocli). Enlarged. 



5. Head of Lxnilla setosissima, Sav. Enlarged. 



6. Head of Hvarne Hubrechti, Mel. Enlarged. 



- 7. Head of Harmothoe Fraser-Thomsoni, Mel. Enlarged. 



8. Head of Malmgrenia andreapolis, Mel. The median tentacle is imperfect. Enlarged 



9. Head of Polynoe scolopendrina, Sav. Enlarged. 



10. Head of Antinoe Sarsii, Mgrn. Enlarged. 



11. Head of Halosydna gelatinosa, Sars. Enlarged. 



12. Head of small example of Evarne Johnstoni, Mel. Enlarged. 



13. Head of Harmothoe antilopis, Mel. Enlarged. 



14. Head of Antinoe mollis. Mel. Enlarged. 



15. Head of Malmgrenia eastanea, Mel. Enlarged. 



16. Head of Panthalis (Erstedi, Kbg. Enlarged. 



17. Head of Leanira hystrieis, Ehlers. Enlarged. The specimen was somewhat im- 



perfect. 



