104 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 25 



15. Posterior parapodia with more numerous, yellow spinelike 

 setae in transverse rows . . Cirriformia spirabrancha 



16. Neuropodial spines first present from segment 6-11; noto- 

 podial spines first present 4 to 6 segments farther back 

 Cirratulus cirratus 



16. Neuropodial spines first present from about segment 17-26; 



notopodial spines first present about 10 segments farther back 



Cirratulus cirratus spectabilis 



16. Neuropodial spines first present from about segment 30-39 ; 

 notopodial spines first present farther back .... 

 Cirratulus cirratus cingulatus 



17. Prostomium with paired transverse rows of eyes, resembling 

 those of Cirratulus cirratus . Chaetozone multioculata 



17. Prostomium without eyes in transverse series . . . . 18 



18. Acicular spines present in neuropodia from the first parapodia; 

 prostomium usually with a pair of lateral eyes 

 Chaetozone corona 



18. Acicular spines first present in more posterior segments . 19 



19. Anterior neuropodial setae of 2 kinds, the one short and 

 limbate, the other unusually prolonged and whiplike 

 Chaetozone spinosa 



19. Anterior neuropodial setae without long, whiplike setae . 20 



20. Notopodial setae nearly all capillary ; neuropodial acicular 

 spines distally serrated .... Chaetozone gracilis 



20. Notopodial setae replaced by spines in posterior segments; 



neuropodial spines distally simply falcate 



Chaetozone setosa 



21. Acicular spines present from first neuropodium and in noto- 



podia from antero-middle region of body 



Caulleriella alata 



21. Acicular spines first present behind first segment ... 22 



22. Acicular spines first present from about third neuropodium 

 and in notopodium from about sixth to ninth segment 

 Caulleriella bioculata 



22. Acicular neuropodial spines first present from median seg- 

 ments and in notopodia from more posterior segments 

 Caulleriella hamata 



