COMPLETE HARTMAN: POLYCHAETES FROM CALIFORNIA 85 



This species is distinguishable from others of the genus as indicated 

 in the key above. In California it is limited largely to southern waters, 

 in estuarine flats, and has been found most abundant in intertidal flats 

 of San Diego Bay, where it is collected in quantity as fish bait. 



The species has a cosmopolitan distribution in warm seas. 



Family ORBINIIDAE 



Genus Naineris Blainville, 1828 



Type N. quadricuspida (Fabricius) 1780 



Naineris nr, quadricuspida (Fabricius) 1780 



Fauvel, 1927, pp. 23-24, fig. 8. 



Collection. 7.1 mi east of Long Point, Santa Catalina Island, in 

 370 fms. ( 1 ) . 



A single mature individual was collected ; it agrees most nearly with 

 Naineris quadricuspida, known from north Atlantic waters. The pro- 

 stomium is broadly rounded in front and lacks eyes. The peristomium 

 is a smooth ring without parapodia. Branchiae are large and present 

 from the fourth setigerous segment ; they are continued posteriorly 

 beyond the middle region of the body; a posterior end is lacking. The 

 inner branchial bases, in abdominal segments, leave a broad, middorsal 

 space bare. Transition from thorax to abdomen is after the eleventh 

 setigerous segment. 



Thoracic neuropodia have an anterior row cf about 12 distally pointed 

 setae, followed by more posterior rows of curved acicular spines, ap- 

 proximately 12 in a row for 3 rows. These spines or uncini are distally 

 bluntly rounded, slightly genticulate along their exposed length, and 

 transversely barred along the outer side ; they lack a distal hood. 



The notopodial postsetal lobe is cirriform, elongated, present from 

 the first parapodium and continued long into abdominal segments, and 

 diminishing in length in postmedian segments. In this respect, the speci- 

 men differs from typical Naineris quadricuspida (see Fauvel, 1927, fig. 

 8). 



This individual was associated with a deep, rock-bottom fauna in- 

 cluding siliceous sponge, a galatheid crab, a psolid holothurian, and some 

 other animals (see Hartman, 1955a, p. 139). 



Naineris quadricuspida is elsewhere known from north Atlantic and 

 boreal seas. 



