TREADWELL 



PLATE 3 



1 and 2. Marphysa viridis n. sp. : 



1. Maxillae, X19. 



2. Mandible, X19. 



3 to 9. Marphysa nobilis n. sp.: 



3. Head, X9. 



4. 150th parapodium with gills, 



X13. 



5. First parapodium, X27. 



6. Compound seta, X232. 



7 . Pectinate seta from middle of 



body, X232. 



8. Maxillae, X8. 



9. Mandible, X6. 



10 and 11. Sabella alba n. sp.: 



10. Collar and base of gills from 



ventral surface, X5. 



11. Collar and base of gills from 



dorsal surface, X5. 



12 to 15 S. alba cont. 



12. Lanceolate thoracic seta, 



X280. 



13. Club-shaped thoracic seta 



from side view, X280. 



14. Club-shaped thoracic seta 



from face view, X280. 



15. Thoracic uncinus, X280. 



16 to 19. Parasabella sulfurean.sp.: 



16. Base of gills and collar from 



dorsal surface, X2. 



17. Base of gills and collar from 



ventral surface, X2. 



18. Longer seta from first somite, 

 X280. 



19. Shorter seta from first somite, 



X280. 



20 to 23 P. sulfurea cont. 



20. Slender seta from second 



somite, X280. 



21. Rounded seta from second 



somite, X230. 



22. Uncinus, X280. 



23. Pennoned seta accompany- 



ing the uncini, X280. 

 24 to 27. Metalonome brunnea n. sp.: 



24. Collar and base of gill from 



dorsal surface, X5. 



25. Collar and base of gill from 



ventral surface, X5. 



26. Seta from collar fascicle, 



X280. 



27. Thoracic unciiius, X280. 



