94 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 15 



9. Neuropodia with an erect lobe at the superior edge . . .10 



9. Neuropodia without an erect lobe at the superior edge . . . 12 



10. Interramal cirri first present from segment 4 11 



10. Interramal cirri first present from segment 8 N. monroi, p. 107 



11. Proboscis with a large median papilla; superior neuropodial 

 lobe continued far back N. impressa, p. 97 



11. Proboscis without a median papilla; superior neuropodial lobe 

 present in a few anterior segments . N. singularis, p. 98 



12. Prostomium with a pair of black eyespots on the posterior half; 

 interramal cirri present from segment 3 N. magellanica, p. 100 



12. Prostomium without such eyespots 13 



13. Middle setae in postacicular fascicles with a few coarse teeth 

 20 



13. Postacicular setae without a few coarse teeth . . . .14 



14. Neuropodial postsetal lamella greatly prolonged and foliaceous 

 in median and posterior regions, greatly surpassing the cor- 

 responding notopodial lobe (pi. 18, fig. 3) 15 



14. Neuropodial postsetal lobe not so prolonged 16 



15. Anterior margin of second segment with a pair of eyespots; 

 notopodial preacicular lobe conspicuously excavate (pi. 17, fig. 



2) N. hombergi, p. 101 



15. Without eyespots on second segment; notopodial preacicular 

 lobe incised but not excavate . N. assignis, p. 112 



16. Interramal cirri first present from segment 6 or 7 . . .17 



16. Interramal cirri first present from segment 3 to 5 . . . 18 



17. Anterior acicular lobes broadly rounded (pi. 13, fig. 3) . 

 N. glabra, p. 109 



17. Acicular lobes conical and prolonged 17a 



17a. Dorsal postsetal lobe foliaceous; preacicular barred setae in- 

 conspicuous and few in middle and posterior segments . 

 N. phyllocirra, p. 108 



17a. Dorsal postsetal lobe little developed; preacicular barred setae 



not so reduced N. incisa, p. 108 



18. Acicular lobes conical 19 



18. Acicular lobes usually broadly rounded to incised . . .21 



19. Interramal cirri first present from segment 3 ; postacicular setae 

 toothed at outer edge N. panamensis, p. 101 



19. Interramal cirri first present probably from segment 5; post- 

 acicular setae smooth ; posterior prostomial antennae bifid . 

 N. cornuta, p. 106 



