X ILLUSTRATIONS 



PLATE FACING PAGE 



XXIV. Schizobranchla insignis^ S. nobilis^ Eudistylia ab- 



breviata 306 



XXV. Myxicola glacialis, Aspeira tnodesta^ Eudistylia 



gigajitea^ Crucigera irregularis 30S 



XXVI. Myxicola conjuncta^ M. glacialis, Sabella elegatis^ 



Serpula splendens 310 



XXVII. ScJiizobranchia insignis, Sabella hufjiilis, S. leptalea, 

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

 bis setJiidentatus, S. spirillum lucidus, Eupomatus 



gracilis 312 



XXVIII. ScJiizobranchia dubia, S. concinna, S. insignis, S. 

 nobilis, Crucigera formosa, Parasabella maculata^ 



Spirorbis asperatus 314 



XXIX. Schizobranchla dubia, Serpula splendens, Spirorbis 

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

 regularis, C. zygophora, Eudistylia polymorpha.. 316 

 XXX. Chone teres, Serpula splende?ts, Spirorbis asperatus. 318 



XXXI. Crucigera formosa, C. zygophora 320 



XXXII-XLIV. Details of Annelid Sete, etc 322-339 



TEXT FIGURES 



FIGURE PAGE 



I. MesenchytrcEus unalaskce 21 



2, 3. Mcsenchytrceus asiaticus 22, 23 



4-6. Mesenchytrceus harrifttani 24, 25 



7-9. Mesenchytrceus setchelli 27, 28 



10, II. Mesenchytrceus franciscanus 3°? 3^ 



12, 13. Mesenchytrceus obscurus 33, 34 



14. Mesenchytrceus maculatus 36 



15. ]\Iesenchytrc€us vegce 38 



16. Mesenchytrceus orc<^ 39 



17. Mesenchytrceus kincaidi 42 



18, 19. Mesenchytrceus penicillus 43^44 



20. ]\Tesenchytrceus gra?idis 45 



21-23. Mesenchytrceus fuscus 47? 4^ 



24. Mesenchytrceus fuscus inermis 49 



25. Mesenchytrceus eastvooodi 51 



26. Mesettchytrceus na7tus 52 



27. Mesenchytrce?(s fontinalis 53 



28. Mesenchytrceus fontinalis gracilis 54 



