PLATE XXXIX. 



Fig. I. Cructgera trregularis sp. nov., p. 234. Collar seta from type. 



2. Uncial plate from thorax. 



3. Uncial plate from abdomen. 



4. Seta from abdomen. 



5. Another uncial plate from thorax. 



6. Cructgera formosa sp. nov., p. 233. Uncial plate from thorax of type? 



showing abnormal development. 



7. Abdominal uncinus, front view. 



8. Cructgera zygophora (Johnson), p. 233. Abdominal uncinus, 



9. Sfirorbis eximius sp. nov., p. 239. Caudal seta from specimen from 



Pacific Grove, California. 



10. Cructgera formosa sp. nov., p. 233. Collar seta. 



11. Abdominal uncinus. 



12. Cructgera zygophora (Johnson), p. 233. Abdominal seta. 



13. Thoracic uncinus. 



14. Cructgera formosa sp. nov., p. 233. Another uncinus from thorax, 



more normally developed than fig. 6. 



15. Cructgera zygophora (Johnson), p. 233. Another abdominal uncinus. 



16. Sftrorbis similis sp. nov., p. 242. Seta from second thoracic fascicle. 



17. Cructgera zygophora (Johnson), p. 233. Collar seta. 



18. Spirorbts for77iosus sp. nov., p. 251. Collar seta. 



19. Another, from different specimen. 



20. Cructgera zygophora (Johnson), p. 233. Thoracic uncinus, about 



view. 



21. Spirorbts spirillum (Linn^) var. lucidiis (Montagu), p. 243. Collar 



seta from specimen from Casco Bay. 



22. Capillary seta from thorax of a specimen from Pacific coast. 



23. Collar seta from another specimen from Atlantic coast. 



24. Spirorbis variabilis sp. nov., p. 238. Collar seta. 



25. Another, showing variations in serrations. 



26. Spirorbis marioni Caullery and Mesnil, p. 239. Nearly front view of 



operculum, showing calcareous plate of specimen from Mexico. 



27. Side view of same. 



28. Spirorbis sfirillum (Linne) var. lucidus (Montagu), p. 243. Collar 



seta from specimen from Pacific Grove, California. 



29. Spirorbis lineatus sp. nov., p. 242. Collar seta. 



30. Spirorbis tubceformis sp. nov., p. 251. Seta from second thoracic 



fascicle of specimen from Long Island Sound. 



31. Spirorbis similis nov., p. 242. Collar seta from immature speci- 



men. 



32. Spirorbis tubceformis s,"^, nov., p. 251. Collar seta from same specimen 



as fig. 30. 



33. Serpula splendens sp. nov., p. 230. Caudal uncinus, front view, much 



enlarged. 



(336) 



