154 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 



PLATE 28 



Figures 327 to 333, Pisionella hancocki: Fig. 327, second para- 

 podium, with setae and acicula indicated, x 66 ; Fig. 328, first 

 parapodium, showing long, thick ventral cirrus and globular 

 dorsal cirrus, x 66; Fig. 329, proboscis dissected open to show 

 the 4 chitinous jaws; the position and number of the terminal 

 papillae could not be accurately determined; the parallel lines 

 indicate the midventral line, x 66; Fig. 330, acicular seta and 

 composite seta from second parapodium, x 290; Fig. 331, a 

 median parapodium, with acicula and setae indicated ; the 

 ventral elongation represents perhaps a nephridial papilla, x 

 66; Fig. 332, 3 composite setae from a median parapodium, the 

 comb plates on the shaft are in paired series, those on the 

 appendage in a single row, x 290; Fig. 333, third parapodium, 

 x 66. 



