Chamberlin. — Pacific Coast Polychaeta. 



PLATE 2. 



PisTA BREViBRANCHiA Chamberlin. 



Fig. 1. Thoracic uncinus of segment V. X 616. 



Fig. 2. Thoracic uncinus of segment XI. X 616. 



Fig. 3. Thoracic uncinus of segment XX. X 616. 



Fig. 4. Abdominal uncinus. 



Sabellaria nanella Chamberlin. 



Fig. 5. Opercular paleolus of outer series, caudoectal view. X 80. 

 Fig. 6. Opercular paleolus of inner series, lateral view. X 80. 

 Fig. 7. Parathoracic notopodial seta. X 244. 



Serpula nannoides Chamberlin. 

 Fig. 8. Operculum. X 20. 



Crucigera hespera Chamberlin. 

 Fig. 9. Operculum. X 20. 



Nainereis nannobranchia Chamberlin. 

 Fig. 10. Thoracic neuropodial seta of posterior series. X 180. 



