POLYCHAETE WORMS — PETTIBONE 561 



stone, pebbles, rocks, shells, much detritus; 6 specimens, Stations 

 18, 23, 45. 



Distribution: Widely distributed in the Arctic. Also Iceland, 

 Faroes, Norway to Azores and Mediterranean; Hudson Bay to Rhode 

 Island; Bering Sea; north Japan Sea. In low water to 1,883 fathoms. 



Family Spionidae 



Both genera represented have setiger 5 not modified, prostomium 

 without frontal horns, with more than one pair of branchiae beginning 

 on setiger 2, and with anal cirri. 



Key to the genera of Spionidae from Labrador 



1. Branchiae present on only few anterior segments, 3-11 pairs, often pinnate. 



With hooded crotchets in both noto- and neuropodia Prionospio 



Branchiae more than 11 pairs, not pinnate. Without hooded crotchets in 

 notopodia of posterior segments Laonice 



Genus Prionospio Malmgren, 1867 

 Prionospio malmgreni Clapar^de, 1868 



Prionospio mahngreni Pettibone, 1954, p. 282, fig. 32,i-k. 



New records: Labrador: Hebron Fjord, St. Lewis Inlet, 40-100 

 fms., mud; 2 specimens, Stations 5, 74. 



Distribution: Arctic Alaska to Washington; north Japan Sea; 

 Iceland, Norway to Mediterranean; Labrador to Massachusetts; 

 South Africa. In low water to 250 fathoms; surface. 



Genus Laonice Malmgren, 1867 



Laonice cirrata (Sars, 1851) 



Nerine cirrata Sars, 1851, p. 207. 



Scolecolepis cirrata Malmgren, 1867, p. 91, pi. 9, fig. 54. 



Scololepis cirrata Verrill, 1881, pp. 298, 301, 304, 309, 312, 316. 



Spionides foliata Moore, 1923, p. 182. 



Spionides sacculata Moore, 1923, p. 184. 



Laonice cirrata Fauvel, 1927, p. 38, fig. 12,a-e.— Anneukova, 1937, p. 169; 1938, 

 p. 172.— Gorbimov, 1946, p. 38.— Zatsepin, 1948, p. 132, pi. 32, fig. 12.— 

 Hartman, 1948, p. 36. — Hartman and Reish, 1950, p. 28. — Wesenberg-Lund, 

 1950a, p. 30; 1950b, p. 75; 1951, p. 68, fig. 6; 1953, p. 56. Berkeley and 

 Berkeley, 1952, p. 26, figs. 49-51. 



Description: Prostomium enlarged and rounded anteriorly, with 

 two eyes and an occipital antenna, with a dorsal crest extending back 

 about 30 segments. Branchiae cirriform, well separated from the 



