104 . M.I. AX HANCOCK PACIFIC EXPEDITION'S VOL. 25 



PLATE 33 



1. Plakosyllis americana, new species (Sta. 5768). Neuropodial falci- 

 gerous seta, x 10,000 



2-5. EUCLYMENINAE (Sta. 5538): 



2. Posterior end showing caudal plaque and 6 anteanal asetigerous 

 segments, x 8. 



3. Caudal plaque seen from the end, x 14. 



4. Rostrate neuropodial seta, in lateral view, x 1400. 



5. Rostrate seta seen from the distal free end to show seried rows 

 of teeth, x 2980. 



