462 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



PLATE 49 



Figures 1-5, Notomastus (Clistomastus) luridus: Fig. 1, last 2 thor- 

 acic and first 2 abdominal segments in right lateral view, x 20; 

 Fig. 2, prostomium in dorsal view, showing palpode and nuchal 

 slits, X 110; Fig. 3, median abdominal segments in dorsal view, 

 X 22; Fig. 4, abdominal hook in lateral view, x 1350; Fig. 5, 

 abdominal hook in frontal view, x 1350. 



