1909.] NATURAL SCIENCES OF PHILADELPHIA. 351 



Sphcerodorum paj)illifcr — figs. 11, 12. 



Fig. 11. — Parapodivim X with setje, X 98. 

 Fig. 12. — Seta from X, X 440. 

 Spharodorum brevicapitis — figs. 13, 14. 



Fig. 13. — Parapodium X (the parts may be abnormally separated "owing to 



distention of body walls) without setae, X 56 

 Fig. 14.— Average seta from somite X, X 440. 

 Phyllodoce ferruginen — figs. 15-18. 

 Fig. 15. — Anterior end, X 56. 

 Fig. 16. — Parapodium XXV with dorsalmost and ventralmost seta shown, 



X 56. 

 Fig. 17. — End of neuropodium showing tip of aciculum, X 500. 

 Fig. IS. — Profile and front view of region of articulation of seta from XX^' 

 X 440. 



Plate XVI. — Anaitis poUjnoides — figs. 19-21. 



Fig. 19. — -interior end, from the dorsum, X 24 



Fig. 20. — Parapodium of XX"\', anterior view, dorsalmost and Aentralmost 

 setge sho^^^l, X 24. 



Fig. 21. — Profile and rear views of articular region of two set;p from somite 

 X, X 360. 

 Eumidia tuhiformis — figs. 22, 23. 



Fig. 22. — ^\nterior aspect of parapodium L, showing dorsalmost and ventral- 

 most setse in place, X 24. 



Fig. 23. — A seta from somite XX'N^, X 360. 

 Eulalia nigrimaculata — figs. 24-26. 



Fig. 24. — .interior aspect of parapodium L, with dorsalmost and \entral- 

 most setae in place, X 24. 



Fig. 25. — Outline of neuropodium showing tip of aciculum, X 56. 



Fig. 26. — Two views of articular region of seta from X, X 440. 

 Eulalia lericornuta — figs. 27-30. 



Fig. 27. — -Interior end, X 24. 



Fig. 28. — Anterior aspect of parapodium XX\\ X 56. 



Fig. 29. — Same of parapodium LXX\', with dorsalmost and Aentralmost 

 setae in place, X 24. 



Fig. 30. — A seta from XXV; a, front view of articulation of same. X 440. 

 Eulalia bifoliata— figs. 31-34. 



Fig. 31. — Head from dorsum, X 24. 



Fig. 32. — Posterior view of parapodium XXXIII, witliout iioto.style or 

 setfe, X 56. 



Fig. 33. — Anterior view of parapodium XXXIX, without seta>, X 56. 



Fig. 34. — Profile and reai" views of articulation of seta from XXXIII, X 440. 



