550 PROCEEDINGS OF THE NATIONAL MUSEUM yol. iob 



Distribution: Widely distributed in the Arctic. Also Iceland, 

 Norway to AlediteiTanean and Adriatic; Hudson Bay to Chesapeake 

 Bay; Bering Sea to southern California; north Japan Sea; South 

 Africa. In low water to 1,000 fathoms. 



Harmothoe impar (Johiislon, 1839) 



Polynoe impar Johnston, 1839, p. 436, pi. 22, figs. 3-9.— Theel, 1879, pp. 9, 15. 

 Evarne impar Malmgren, 1865, p. 71, pi. 9, fig. 7.— Verrill, 1881, p. 319. — Not 



Mcintosh, 1900, p. 3.53, figs.— Not Southern, 1914, p. 53. 

 Harmothoe impar Moore, 1902, p. 270. — Not Alaejos y Sanz, 1905, p. 60, figs. — 



Ditlevsen, 1917, p. 12, fig. 1, pi. 2, fig. 16, pi. 3, fig. 11.— Eliason, 1920, 



p. 20.— Not Fauvel, 1923, p. 59, fig. 21,a-f.— Augener, 1928, p. 678; 1933, 



p. 197.— Annenkova, 1937, p. 151, pi. 1, figs. 4, 8; 1938, p. 135.— Gorbunov, 



1946, p. 38.— Thorson, 1946, p. 48.— Not Zatsepin, 1948, p. 108, pi. 28, fig. 



12,b-f,h.— Wesenberg-Lund, 1950a, p. 6; 1950b, p. 21; 1951, p. 14 (part); 



1953, p. 19. 

 Harmothoe fragilis Moore. 1910, p. 353, pi. 29, figs. 29, 30, pi. 30, figs. 31-33; 



1923, p. 256. 

 Harmothoe bonitensis Essenberg, 1917, p. 48, pi. 2, figs. 1-11. 

 Evarnella impar Chamberlin, 1920, p. 7. — Treadwell, 1937, p. 25 (part; examined 



in USNM). 

 Harmothoe impar var. grandispina Annenkova, 1937, pp. 152, 208, pi. 1, fig. 2; 



1938, p. 135. 

 Harmothoe impar var. parvispinosa Annenkova, 1937, pp. 152, 209, pi. 2, fig. 10; 



1938, p. 135. 



Description: Segments 37-41. Body wide, flattened dorsoven- 

 trally, fragmenting easily. Prostomium with cephalic peaks prom- 

 inent; eyes large, anterior pair dorsolateral in region of greatest 

 prostomial width. Antennae and dorsal cirri with short papillae. 

 Elytra with numerous conical micro tubercles — some hooked, with 

 short delicate scattered papillae on elytral border and sm-face, with 

 large soft tubercles near external border, tubercles wider at the base 

 and not sharply set off from elytral surface (may give border of 

 elytra a scalloped efl'ect). (The elytra differ thus from the descrip- 

 tion of FI. impar as given hj Mcintosh (1900), Fauvel (1923), and 

 others; this has been indicated previously by Ditlevsen (1917).) 

 Noto- and nem-opodia extend out into digitiform acicular lobes; tip 

 of nem'opodial lobe with tentacularlike process above the projecting 

 aciculum. Notosetae distinctly stouter than neurosetae, with long 

 spinous regions, with pointed to blunt bare tips. Neurosetae delicate, 

 with long spinous regions, upper ones more slender, with entire tips; 

 mostly with tips slightly hooked, with a secondary tooth or a remnant 

 of it. Color in alcohol: DarkW pigmented dorsally, with wide trans- 

 verse brown bands between the elytrophores and dorsal tubercles, 

 with an area without color middorsally and two transverse bands 

 converging in the region of the elytrophores and dorsal tubercles; 

 elytra with mottled brownish coloration. 



