X ILLUSTRATIONS 



PLATE FACING PAGE 



XXIV. Schizobranchia insignis, S. nobilis, Eudistylia ab- 



breviata 306 



XXV. Myxicola glacialis, Aspeira modesta, Eudistylia 



gigantea, Crucigera irregularis 308 



XXVI. Myxicola conjuncta, M. glacialis, Sabella elegans, 



Serpula splendens 310 



XXVII. Schizobranchia insignis, Sabella humilis, S. leptalea, 

 S.formosa, S. elegans, Parasabella media, Spiror- 

 bis semidentatus, S. spirillum lucidus, Eupomatus 



gracilis 312 



XXVIII. Schizobranchia dubia, S. concinna, S. insignis, S. 

 nobilis, Crucigera formosa, Parasabella maculata, 



Spirorbis asperatus 314 



XXIX. Schizobranchia dubia, Serpula splendens, Spirorbis 

 variabilis, S. rugatus, S. similis, Crucigera ir- 

 regularis, C. zygophora, Eudistylia polymorpha.. 316 

 XXX. Chone teres, Serpula splendens, Spirorbis asperatus. 318 



XXXI. Crucigera formosa, C. zygophora 320 



XXXII-XLIV. Details of Annelid Setae, etc 3 22 ~339 



TEXT FIGURES 



FIGURE PAGE 



i. Mesenchytrceus unalaska 21 



2, 3. Mesenchytrceus asiaticus 22, 23 



4-6. Mesenchytrceus harrimani 24, 25 



7-9. Mesenchytrceus setchelli 27, 28 



10, ii. Mesenchytrceus franciscanus 30, 31 



12, 13. Mesenchytrceus obscurus 33, 34 



14. Mesenchytrceus maculatus 36 



15. Mesenchytrceus vegce 38 



16. Mesenchytrceus orcce 39 



17. Mesenchytrceus kincaidi 42 



18, 19. Mesenchytrceus penicillus 43, 44 



20. Mesenchytrceus grandis 45 



21-23. Mesenchytrceus fuscus 47, 48 



24. Mesenchytrceus fuscus inermis 49 



25. Mesenchytrceus east-woodi 51 



26. Mesenchytrceus nanus 52 



27. Mesenchytrceus fontinalis 53 



28. Mesenchytrceus fontinalis gracilis 54 



