466 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



PLATE 51 



Figures 1-5, Notomastus lobatus, new species: Fig. 1, last 3 thoracic 

 and first 7 abdominal segments, in right lateral view, x 4.6 ; 

 Fig. 2, abdominal hooded hook in lateral view, x 1570; Fig. 3, 

 abdominal hooded hook in frontal view, x 1570; Fig. 4, abdom- 

 inal segments 41 to 48 in ventrolateral view, x 12.8 ; Fig. 5, pros- 

 tomial lobe in dorsal view, x 12.8. 



