106 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 25 



Neuropodial spines are first present from about segment 17 to 19, 

 or in larger specimens not before segment 26 to 29 ; they number about 

 3 in a series and alternate with longer, pointed setae. Notopodial and 

 neuropodial spines in a segment are about equally thick, with the 

 thickest ones midlateral, and decrease in thickness more distally. This 

 character may distinguish the subspecies from others. 



Color in life is dark olive green to almost black; the prostomium is 

 paler and has dark eyespots. The dorsal tentacles are strewn with red 

 spots in irregular rows. 



C. cirratus spectabilis is distributed in the northeastern Pacific Ocean 

 in littoral zones, seldom south to central California. 



Girratulus cirratus cingulatus Johnson, 1901 



Cirratulus cingulatus Johnson, 1901, pp. 422-423, pi. 14, figs. 145-148. 



Collections. Numerous collections come from the northeastern Pa- 

 cific Ocean, south to central California, from intertidal rocky bottoms. 



Length is 50 to 100 mm. In the type specimen neuropodial spines are 

 first present from segment 35 and notopodial spines from segment 45. 

 In others there is some departure from this location but only within 

 limits of less than 10 segments. The prostomium tends to be prolonged 

 forward. In median segments the acicular spines are unaccompanied 

 by slender pointed setae. This subspecies differs from nearly related 

 ones in that the largest acicular spines in a fascicle are located at the 

 distal ends of the two rami, and they decrease in size toward the mid- 

 lateral line, thus contrasting with the condition in C. cirratus spectabilis 

 where they are largest medially and decrease in size at dorsal and 

 ventralmost ends of the fascicle. 



C. cirratus cingulatus ranges through the northeastern Pacific Ocean, 

 in shallow or littoral depths ; it is associated with rocky habitats. 



Discussion of the Genera Caulleriella, Chaetozone 



and Tharyx 



Species of these three genera are usually distinguished from one 

 another with difficulty. All have an anterior pair of palpi, usually fallen 

 away from preserved specimens ; they originate on the dorsal side in 

 front of, or on the first setigerous segment. Parapodia are reduced to 

 low, papillar mounds and have no characteristic lobes. The only reliable 

 characters concern the microscopic details of setae and spines, especially 

 those from the posteriormost segments of the body. 



