124 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 7 



PLATE 13 



Figures 153 to 162, Sthenelais fusca: Fig. 153, superior spinose 

 neuropodial seta from one hundred fifth parapodium, x 290; 

 Fig. 154, fine superior composite neuropodial seta from same 

 parapodium, x 290; Fig. 155, median composite neuropodial 

 seta from same parapodium, x 290; Fig. 156, stout dorsalmost 

 neuropodial seta from individual from Point Loma, x 290 ; Fig. 

 157, stout dorsalmost neuropodial seta from individual from 

 Sinaloa, x 290; Fig. 158, a ventral cirrus with dorsal processes, 

 X 66\ Fig. 159, arrangement of insertion of neuropodial setae 

 in neuroaciculum in a parapodium in anterior third of body; 

 top is dorsal, to the right is anterior, x represents simple spinose 

 setae, dots slender composite setae (343-34); Fig. 160, outline 

 of elytrum from fortieth parapodium, from individual from 

 Chatham Bay, stippling represents papillar region, x 12.5 ; Fig. 

 161, seventh elytrum from individual from Point Loma, most 

 of surface papillated but not shown, x 32; Fig. 162, elytrum 

 from about thirtieth last segment from individual from Point 

 Loma, papillae covering most of surface not indicated, x 32. 



Figures 163 to 166, Sthenelais 'variabilis colorata: Fig. 163, fifth 

 elytrum, elytral scar indicated, surface finely papillated though 

 not shown, x 25 ; Fig. 164, part of posterior margin from pre- 

 ceding, showing distribution of surface papillae and beaded 

 margin, x 130; Fig. 165, a median neuropodial seta from about 

 forty-fifth parapodium, x 290; Fig. 166, twenty-fifth neuro- 

 podium, showing the main papillar series ventral to the in- 

 feriormost neuropodial setae, x 66. 



