470 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



PLATE 53 



Figures 1-4, Heteromastus filobranchus : Fig. 1, abdominal hook in 

 lateral view, x 1540; Fig. 2, abdominal hook in frontal view, 

 X 1540; Fig. 3, distal end of long-handled, thoracic hook, in 

 lateral view, x 1264; Fig. 4, distal end of long-handled, thoracic 

 hook, in frontal view, x 1264. 



