NO. 2 HARTIMAN : QUANTITATIVE SURVEY 193 



Notosetae occur in small, close fascicles and do not extend to the 

 distal ends of neuropodial lobes. Notosetae are hairlike; under high mag- 

 nification they show deep lateral serrations (Fig. 2). Neurosetae (Fig. 3) 

 are much coarser; each is distally entire, the tip long, smooth, slightly 

 falcate, and with four to seven rows of serrations subproximally. 



Gattyana brininea approaches G. ciliata Moore (1902, p. 263) from 

 which it differs in lacking heavy elytral fringe, and in the details of para- 

 podial setae. 



Gattyana brunnea was taken only at Sixmile bank, in 300 fms, in 

 rocky bottom. 



Genus Halosydna Kinberg, 1855 

 Halosydna latior Chamberlin, 1919 



Halosydna latior ChamhtrVm, 1919:1-2; Rioja, 1941 :680. 



Collections: Many specimens come from shallow depths off southern 

 California, usually in a large gastropod shell occupied by a pagurid crab, 

 especially in shells of Folinices and Stronibus occupied by Holopaguriis 

 pilosus Holmes. The commensal polynoid is usually paired, with the indi- 

 viduals near the anterior end of the crab. The body is greatly depressed, 

 unusually broad for a Halosydna ; its length is 40 to 50 mm, its width 

 14 to 20 mm, and segments number 37. The 18 pairs of elytra are broadly 

 imbricated and completely cover the body. The prostomium has two pairs 

 of moderately large eyes, the anterior pair just in front of mid-length, the 

 posterior pair nearer together and near the posterior margin. Parapodia 

 are distinctly biramous with smaller notopodia and larger neuropodia. 

 Neurosetae are thick, distally falcate, the tip entire. Elytra are character- 

 istic ; they have broad, smooth surfaces and enlarged, very flat, pale pus- 

 tules in an area behind the elytral scar. 



Halosydna latior is recorded from southern California and western 

 Mexico, in shelf depths; its association with pagurid crabs is not previ- 

 ously mentioned. 



Genus Harmothoe Kinberg, 1855 



Harmothoe priops Hartman, 1961 

 (Plate 1, Figs. 4-6) 

 Harmothoe priops Hartman, 1961b :50-51 ; Hartman, 1963b :3. 

 Collections: Sta. 2314 ; Sta. 4886. 



The body is about 7 mm long, 0.7 mm wide, and segments number 

 39. The dorsum is crossed by broad, reddish brown pigment bars which 



