Johnson —Polychaeta. 
PLATE 4. 
Pigs. 33-38. Nereis vexillosci. 
Fig. 33. Anterior aspect of heteronereizecl foot. X 8.5. 
Fig. 34. Foot from posterior portion of body of young female. X 8.5. 
Fig. 35. Foot from posterior region of large adult female, with much elon¬ 
gated dorsal lobe. b. v. Blood-vessel, ov. Ova lying within coe- 
lomic space. X 8.5. 
Fig. 30. Stout sickle-shaped seta from dorsal ramus. X 150. 
Figs. 37, 38. Sickle-shaped and “ fish-bone” setae from ventral ramus. X 150. 
Figs. 39-45. Nereis agassizi. 
Fig. 39. Anterior extremity. X 8.5. 
Fig. 40. “Fish-bone” seta from dorsal ramus. X 200. 
Figs. 41, 42. Sickle-shaped setae from ventral ramus. X 200. 
Fig. 43. Hooked seta from dorsal ramus. X 200. 
Fig. 44. Foot from middle of series. The glands (g.) at base of upper lobe are 
shown. X 23. 
Fig. 45. Foot from posterior portion of body. X 23. 
Fig. 4G. Anterior, ventral aspect of a young Nereis cyclurus. The prosto- 
mium is partially withdrawn into the large, collar-like peristomium. 
X 8.5. 
Fig. 47. Nereis procera ; foot from anterior portion of body. X 23.5. 
