POLYCHAETE WORMS — PETTIBONE 565 



Brada inhabilis (Rathke, 1843) 



Brada inhabilis Wesenberg-Lund 1953, p. 67. — Pettibone, 1954, p. 292, fig. 

 33,h. 



New record: Labrador: Hebron Fjord, 95 fins., mud; 1 specimen, 

 Station 11. 



Distribution: Widely distributed in the Arctic. Also Iceland, 

 Norway to Danish waters; Labrador to Maine; Bering Sea to Gulf of 

 Alaska; north Japan Sea. In low water to 609 fathoms. 



Brada granosa Stimpson, 1854 



Brada granosa Stimpson, 1854, p. 32, pi. 2, fig. 22.— Verrill, 1881, pp. 289, 308.— 



Webster and Benedict, 1887, p. 732, pi. 5, figs. 72-76.— Not Treadwell, 1937, 



p. 32 { — B. inhabilis). 

 Brada granulosa Hansen, 1882, p. 39, pi. 7, figs. 21-22. — St0p-Bowitz, 1948a, 



p. 47, fig. 13; 1948b, p. 46, fig. 18.— Wesenberg-Lund, 1951, p. 80. 

 Brada granulata Moore, 1909b, p. 143; not B. granulata Malmgren, 1867. 

 Brada inhabilis Annenkova, 1937, p. 176; 1938, p. 185. — Gorbunov, 1946, p. 



39. — Zatsepin, 1948, p. 136; not Siphonosloma inhabilis Rathke, 1843. 



New records: Labrador: Hebron Fjord, 95 fms., mud; 13 speci- 

 mens, Station 11. East Coast North America: Bay of Fundy, 

 off Maine, Massachusetts, 18 to 253 fms., U. S. Fish Commission 

 (identified by Verrill). West Coast North America: Iliuliuk 

 Harbor, Unalaska, 1871, and New Harbor, Unga Island, 1872, W. H. 

 Dall. 



Distribution: Scattered records in the Arctic: Siberian Arctic, 

 Spitsbergen. Also Iceland, Norway; Labrador to Massachusetts; 

 southwestern Alaska; north Japan Sea. In 3 to 253 fathoms. 



Family Scalibregmidae 



Key to the genera of Scalibregmidae from Labrador and Nova Scotia 



1. Body inflated anteriorly, abruptly attenuated on posterior half. Prostomium 

 T-shaped, with frontal horns. Posterior parapodia with digitiform dorsal 

 and ventral cirri (begin on setigers 16-18). Annuli 4 per segment. Py- 



gidium with 4-5 fihform anal cirri Scalibregma 



Body short, fusiform. Prostomium bilobed, without frontal horns. Para- 

 podia without dorsal and ventral cirri. Annuli 2 per segment. Pygidium 

 without anal cirri Polyphysia 



Genus Scalibregma Rathke, 1843 



Scalibregma inflatum Rathke, 1843 



Scalibregma inflatum not Moore, 1909b, p. 143 {= Polyphysia crassa). — Wesen- 

 berg-Lund, 1953, p. 68.— Pettibone, 1954, p. 293, fig. 33,i-k. 



New records: Labrador: Middle and west end Lake Melville, 

 17-35 fms., on bottoms of mud; 3 specimens. Stations 28, 55. 



