COMPLETE HARTMAN: POLYCHAETES FROM CALIFORNIA 103 



3. Anterior dorsal side without paired palpi 7 



4. Simple setae slender and distally pointed 11 



4. Setae partly acicular spines or hooks 5 



5. Acicular setae distally excavate or spoon-shaped ; body often 

 dark green to black 14 



5. Acicular setae not excavate 6 



6. Acicular spines in posterior segments distally entire . .17 



6. Acicular spines in posterior segments distally bifid . . .21 



7. One or more anterior segments with a transverse row of long 

 tentacular cirri or branchiae 8 



7. Anterior region without long tentacular structures (PI. 21, 

 fig. 1 ) Raricirrus maculata 



8. Lateral tentacles first present on first setigerous segment . 16 



8. Lateral tentacles first present behind the first setigerous seg- 

 ment 9 



9. Only one segment with transverse rows of many tentacles . 15 

 9. Several anterior segments with transverse rows of many ten- 

 tacles Timarete perbranchiata 



10. Pygidium with 3 slender appendages . Cossura Candida 



10. Pygidium with many slender appendages 



Cossura pygodactylata 



11. Forming tesselated mucoid tubes; posterior setae toothed or 

 serrated along cutting edge ; body length to 60 mm 

 Tharyx tesselata 



11. Without mucoid tubes ; posterior setae not toothed ... 12 



12. Posterior end more or less inflated ; overall size unusually 

 small, length 3 to 6 mm .... Tharyx monilaris 



12. Posterior end not inflated; body considerably larger . .13 



13. Smaller, length to 15 mm; estuarine . Tharyx parvus 



13. Larger, length to 60 mm; in outer areas 



Tharyx multifilis 



14. Constructing calcareous matrices (PI. 20, upper) 

 Dodecaceria fewkesi 



14. Penetrating calcareous structures, especially abalone shells 

 Dodecaceria concharum 



15. Posterior parapodia with one or few single black spines in 

 a parapodium Cirriformia luxuriosa 



