TREADWELL 



PLATE 3 



1 and 2. Marphysa viridis n. sp. : 



1. MaxillsE. 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. Compouna seta, X232. 



7. Pectinate seta from middle of 



body, X232. 

 S. Maxill®. 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. 



seta, 



seta 



seta 



12 to 15 S. alba — cont. 



12. Lanceolate thoracic 



X280. 



13. Club-shaped thoracic 



from side view, X280. 



14. Club-shaped thoracic 



from face view, X280. 



15. Thoracic uncinus, X280. 



16 to 19. Parasabella sulfurea n. sp.: 



16. Base of gilla 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, X280. 



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 uncinus, X280. 



