302 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



PLATE 24 



Figures 5 3-58, Pseudopotamilla socialis: Fig. 53, superior notoseta 

 from second last thoracic segment, x 435 ; Fig. 54, one of 6 

 longer collar setae, to same magnification; Fig. 55, one of 7 

 shorter collar setae, to same magnification; Fig. 56, one of 10 

 inferior thoracic notosetae, to same magnification ; Fig. 57, un- 

 cinus from second last thoracic segment, to same magnification; 

 Fig. 58, its companion pennoned seta, to same magnification. 



Figures 59, 60, Chone minuta: Fig. 59, portion of tentacular crown, 

 from right dorsal end, showing outer side of 2 pinnated radioles 

 with low palmate membrane, and 3 cirriform radioles at free 

 end, X 21 ; Fig. 60, superior notoseta from median thoracic seg- 

 ment, X 435. 



