474 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



PLATE 55 



Figures 1-5, Dasybranchus platyceps, new species: Fig. 1, anterior 

 end including prostomiura, peristomium and 4 thoracic setigerous 

 segments, in dorsal view, x 9 ; Fig. 2, hooded hook in lateral 

 view, X 931; Fig. 3, hooded hook in frontal view, x 931; Fig. 4, 

 anterior branchial region from right side, in three-quarter view, 

 branchiae wholly to partly everted, the row of papillar lateral 

 organs marks the right lateral line, x 8; Fig. 5, last 5 thoracic 

 and first 7 abdominal segments, in left lateral view, x 7.5. 



