PLATE XXVII. 



Fig. 



1. Oral region of Aphrodita aculeata, L., in contraction and from the ventral surface. 



Enlarged. 



2. Head of Lxtmatonice filicornis, Kbg. Enlarged. 



3. Head of Lagisca Elisabethse, n. s. Enlarged. 



4. Head of Lepidonotus clava, Mont. Enlarged. 



5. Head of Gattyana cirrosa, Fabr. Enlarged. 



6. Head of Acanthicolepis asperrima. Enlarged. 



7. Head of Evarne Johnstoni, Mel. (large example). Enlarged. 



8. Head of Harmothoe lunulata, D. Chiaji. Enlarged. 



9. Head of Eunoa nodosa, Sars. Enlarged. 



10. Head of Lagisca Jeffrey sii. Enlarged. 



11. Head of Harmothoe marphysse, Mel. Enlarged. 



12. Head of S calls etosus pellucidus, Ehlers. Enlarged. 



13. Head of Evarne impar, Johnst. Enlarged. 



14. Head of Lagisca floccosa, Sav. Enlarged. 



15. Head of Harmothoe areolata, Grube. Enlarged. 



16. Anterior end of Eurythoe borealis, Sars, dorsal view. Enlarged. 



17. Head of Acholoe astericola, D. Chiaji. Enlarged. 

 -18. Head of Phyllantinoe mollis, Mel. Enlarged. 



