COMPLETE HARTMAN : POLYCHAETES FROM CALIFORNIA 59 



7. Ventral cirri of segment 2 similar to other tentacular cirri 

 Notophyllum imbricatum 



7. Ventral cirri of segment 2 asymmetrical and foliaceous . 

 Hesperophyllum tectum 



8. First segment fused with prostomium ; segments 2 and 3 free 

 from one another; body elongate . . Hypoeulalia bilineata 



8. First segment not fused with prostomium; body long to short 

 9 



9. Segments 1 and 2 more or less fused with each other ... 10 

 9. Segments 1 and 2 free from one another but sometimes more 



or less dorsally reduced 12 



10. Segments 1 and 2 fused and well developed; nuchal papilla 



present Paranaitis polynoides 



10. Segments 1 and 2 fused and dorsally reduced; nuchal papilla 



absent 11 



10. Segments 1 and 2 fused and dorsally reduced; nuchal papilla 

 present 20 



11. Dorsal cirri cordate; prostomium with a median antenna; 



color in life bluish with metallic iridescence 



Genetyllis nigrimaculata 



11. Dorsal cirri ovate; prostomium without a median antenna; 

 color in life salmon to reddish brown . Genetyllis castanea 



12. Tentacular segments forming complete rings; prostomium with 



a median antenna ; proboscis diffusely papillated 13 



12. First segment dorsally reduced; prostomium with or without 



a median antenna 15 



12. First segment dorsally and ventrally reduced but recognizable 

 laterally ; second segment dorsally reduced ; prostomium with 

 a median antenna Clavadoce splendida 



13. Tentacular cirri cirriform . 27 



13. Ventral cirrus of segment 2 foliaceous and asymmetrical ; other 

 tentacular cirri cirriform 14 



14. Prostomium without eyes; median antenna nearly as long as 

 paired lateral antennae; dorsal cirri lanceolate .... 

 Steggoa gracilior 



14. Prostomium with eyes; median antenna inconspicuous; dorsal 

 cirri distally truncate .... Steggoa calif or niensis 



15. Prostomium with a median antenna 16 



15. Prostomium without a median antenna, and with or without 



a nuchal papilla 19 



