POLYCHAETE WORMS — PETTIBONE 563 



Family Flabelligeridae (Chloraemidae) 

 Key to the genera of Flabelligeridae from Labrador 



1. Body covered with a thick mucous mantle containing long pedunculate papillae. 



Neurosetae stout compound hooks, 1-2 per lobe. Setae of the first setiger 

 numerous, long, directed anteriorly forming a cephalic cage enclosing the 



branchiae, etc Flabelligcra 



Body without mucous mantle. Neurosetae simple or pseudocompound. 



Body covered with short to long papillae (rarely rugose only) , papillae not 



pedunculate 2 



2. Setae of first setigers longer than the following, directed anteriorly forming a 



distinct cephalic cage Pheru.sa 



Setae of first setigers not forming a distinct cephalic cage Brada 



Genus Flabelligera Sars, 1829 



Flabelligera affinis Sars, 1829 



Flabelligera affirms Moore, 1909b, p. 143. 



Flabelligera affinis Pettibone, 1954, p. 289, fig. 33, e-g. 



New records: Labrador: Seven Islands Bay, Okak area, Davis 

 Inlet, 10-30 fms., on bottoms of rubble and mud with rocks and stones; 

 5 spechnens, Stations 20, 30, 31, 77. 



Distribution: Widely distributed in the Arctic. Also Iceland, 

 Norway to France, Mediterranean; Hudson Bay to Massachusetts; 

 Bering Sea to southern California; north Japan Sea; Falkland Islands, 

 Magellan Straits, South Georgia, South Africa, Australia. In low 

 water to 889 fathoms; surface. 



Genus Pherusa Oken, 1807 

 Pherusa plutnosa (Muller, 1776) 



Amphitrite plumosa Miiller, 1776, p. 216. 



Siphonostomum asperum Stimpson, 1854, p. 31. 



Trophonia plumosa Malmgren, 1867, p. 82.— Verrill, 1881, pp. 293, 294, 295, 299.— 

 Webster and Benedict, 1887, p. 729. 



Trophonia aspera Verrill, 1881, pp. 289, 295, 298, 304, 308, 312, 314.— Webster 

 and Benedict, 1887, p. 730.— Moore, 1909b, p. 143. 



Trophonia papillata Johnson, 1901, p. 416, pi. 12, figs. 122-123. 



Stylarioides plumosa Ehason, 1920, p. 61.— Fauvel, 1927, p. 116, fig. 41,a-g; 1933, 

 p. 48.— Okuda, 1937, p. 52, pi. 2, fig. c— Annenkova, 1937, p. 175; 1938, 

 p. 184.— Hartman, 1944c, p. 22.— Gorbunov, 1946, p. 39.— Zatsepin, 1948, 

 p. 135, pi. 33, fig. 2.— Wesenberg-Lund, 1949, p. 334; 1950a, p. 35; 1950b, 

 p. 83; 1951, p. 77; 1953, p. 65.— Berkeley and Berkeley, 1952, p. 9, fig. 7. 



Stylarioides papillata Moore, 1923, p. 221.— Hartman, 1948, p. 40.— Hartman 

 and Reish, 1950, p. 35.— Berkeley and Berkeley, 1952, p. 8. 



Pherusa plumosa St0p-Bowitz, 1948a, p. 13, fig. 2; 1948b. p. 33. 



Description: Body round, slightly flattened ventrally, inflated 

 and abruptly attenuated posteriorly, up to 70 segments. Body covered 



