3 Body brown but without a color pattern. Pseudocompound 



setae of setigers 1-3 bidentate. Comb-setae with about 20 



teeth D. cuprea cuprea 



3' Branchiferous segments with brown crossbars. Pseudocom- 

 pound setae of setigers 1-3 either bidentate or tridentate 



Comb-setae about 25 teeth D. ciipreu apirihmncliis 



4 Setae of first three feet very long, with spiny shafts and 



hooked tips (Rl!anipli()bm)ichiHm). [Branchiae from setiger 



6. No compound spinigerous setae] R. atlatiticum 



4' Setae of first three feet not much longer than .subsequent ones 



and never with spiny shafts (O)iiipliis) 5 



5 Gills in middle of body as a single filament arising from the 



dorsal cirrus (subgenus Notliriu) 6 



5' Gills in middle of body as two or more filaments arising from 



the dorsal cirrus (subgenus Oiiiipliis) 7 



6 Body markedly flattened and first two feet elongated. Tube 



flat with large shell fragments. Gills from setiger 11-13 O. (N.) conrlniliga 



6' Body normal and first two feet not elongated. Tube not flat. 

 Gills from setiger G-7. [2-3 spinigerous compound setae in 

 7th-10th foot. Segments barred in brownl O. (N.) pallidiila 



7 Gills .start on setiger 1. Ceratophores of occipital antennae 



with more than 11 rings O. (O.) cirniitd 



T (;ills start on setiger 6-8. Ceratophores of occipital antennae 



with less than 10 rings 8 



8 One or two spinigerous compound setae in 7th-12th foot. 



[ Anterior ventrum minutely speckled] O. (O.) )!cbuIosa 



8' No spinigerous compound setae 9 



9 Ventral cirri cirriform only on first two feet. Pseudocompound 



setae tridentate O. (O.) nn'crocephala 



9' Ventral cirri cirriform on first four of five feet. Pseudocom- 

 pound .setae bidentate O. (O.) macpia 



Hyalinincia liihicolo (Miiller. 1776) Diopatra cuprea cuprea (Bosc. 1802) 



HudliiKifcid tiil>ic<il(i. - Fauvel, 1923: 421, Fig. Diopntm ciipnii. - Hartman, 1944a: 54, i)l. 1: 



1G(; i-q. - Pettibone, 1963a: 254, Fig. 65 d. - Fig. 9-14. - Pettibone, 1963a. 250, Fig. 66. 



Day, 1967: 411, Fig. 17.9. 1-r. Diopatra rnprva cuprea. - Day, 1967: 417, Fig. 



17.12. a-(l. 

 R( cords. — Common on the continental slope 

 off Beaufort at 450-600 m (17, *). Records. — Common in Beaufort Sound on 



Dislrl/iiifioii. — Cosmopolitan below 200 ni on intertidal banks and shallow dredgings offshore 



.sandy mud. to 20 m (2, 3, 4, 5, 7, 8. 9. 11, 13. 15, 17, 18. 21, 



*). 



Distrl/iiitioii. — Intertidal to 30 m on (juiet, 



54 



