146 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 117 



52(6), 55(2), 56(1), 57(1), B(5), R-2(ll), R-3(57); Bering, Chukchi, 

 and Beaufort Seas; sandy silt, silty sands, or silts. 



Family Capitellidae 



Capitella capitata (Fabricius) 



Lumhricus capitatus Fabricius, 1780, p. 279. 



Capitella capitata. — Pettibone, 1954, pp. 298-299, figs. 33r-u. 



Material: Stations 54(5), 2(1), 6(1); Little Diomede Island and 

 Chukchi Sea. 



Remarks: One specimen collected at Little Diomede Island on 

 July 30, 1956, was incubating eggs within its tube. 



Heteroniastus filiformis (Claparede) »y^ 



Capitella filiformis Claparede, 1864, p. 509, pi. 4, fig. 10. 



Heteromastus filiformis. — Hartman, 1948, p. 41; 1951a, p. 102. — Uschakov, 1955, 

 p. 327, pi. 121, fig. D.— Levenstein, 1960, p. 109. 



Material: Stations 5(12), 30(1), 34(2), 35(2), 47(7), 48(6), 50(1), 

 52(4), 53(2), 55(3), 56(4), 57(3), 59(9), 60(8); Bering and Chukchi 

 Seas; silts. 



Distribution: Widely distributed in the Northern Hemisphere; 

 previously it has been reported from the West Bering Sea by Leven- 

 stein. This is the first report of H.Jiliforrnis from Chukchi Sea. 



Family Maldinidae 



Maldane sarsi Malmgren 



Maldane sarsi Malmgren, 1865, p. 188.— Pettibone, 1954, pp. 303-304, figs. 

 34g-h.— Hartman, 1961, p. 37. 



Material: Stations 55(9), 56(73), 60(1), G-3(l), G-5(l), G-6(2). 

 B(5); Chukchi and Beaufort Seas; silts. 



Nicomache luinbricalis (Fabricius) 



Sabella lumbricalis Fabricius, 1780, p. 374. 



Nicomache lumbricalis. — Berkeley and Berkeley, 1952, pp. 54-55, figs. 111-112. 

 —Pettibone, 1954, pp. 305-306, figs. 34i-j. 



Material: Stations 59(2), B(l); Chukchi and Beaufort Seas; silts. 



Petaloproctus tenuis (Theel) 



Maldane tenuis Theel, 1879, p. 57. 



Petaloproctus tenuis. — Berkeley and Berkeley, 1952, pp. 55-56, fig. 113. 



—Pettibone, 1954, pp. 306-307, figs. 341-m.— Uschakov, 1955, p. 339. 



—Hartman, 1961, p. 37. 



Material: Station R-4(l); Beaufort Sea. 



