COMPLETE HARTMAN: POLYCHAETES FROM CALIFORNIA 79 



distally entire and the cutting edge finely dentate. The end of the 

 shaft is toothed. 



This genus and species are previously known only through the 

 original account, based on specimens found on the branchiae of Am- 

 phicteis gunneri (Sars), from Sweden. The present find is from another 

 host, far removed from the type locality, so that the specific identity 

 may be questioned. Amphicteis scaphobranchiata is common on shelf and 

 slope depths of southern California, but the parasite, in spite of continued 

 search of the host, has not been seen again. 



Family SPHAERODORIDAE 



Four recorded species, and another to be expected, are included in 

 the key below. 



Genus Sphaerodorum Oersted, 1843 

 Type S. gracilis (Rathke) 1843 



Key to species of Sphaerodorum 



1. Parapodia provided only with simple, falcigerous setae 



S. papillifer 



1. Parapodia with composite, falcigerous setae only .... 2 



2. Dorsal papillae disposed in single transverse rows on each seg- 

 ment S. sphaerulifer 



2. Dorsal papillae uniformly scattered over the dorsum in diffuse 

 arrangement; neuropodial cirri very short 3 



2. Dorsal papillae limited to a pair to a segment and located proxi- 

 mal to the parapodia 



S. biserialis (not known from California) 



3. Body short and tumid ; in shallow inshore sediments 

 S. minutum 



3. Body long and slender; in deep to abyssal ocean depths 



S. brevicapitis 



Sphaerodorum papillifer Moore, 1909 



Moore, 1909, pp. 333-334, pi. 15, figs. 11, 12. 

 Ephesia papillifer Berkeley and Berkeley, 1948, p. 27. 



Collections. Point Conception, California, in 12 fms, Santa Monica 

 canyon in 40 fms, to southernmost California, in depths to 500 fms; on 

 rocky bottoms. 



