12 



U.S. NATIONAL MUSEUM BULLETIN 227 



Laetmonice filicornis Moore, 1903a, p. 420; 1909a, p. 137. — Hartman, 1942a, p. 



90.— Treadwell, 1948, p. 11, fig. 26.— Eliason, 1962, p. 213.— Wesenberg-Lund, 



1950b, p. 11; 1951, p. 7.— Miner, 1950, p. 308, pi. 101. 

 Laetmatonice filicornis Fauvel, 1923, p. 36, fig. 12, a-f. — St0p-Bowitz, 1948a, p. 8. 



Description. — Length up to 90 mm., width includmg setae up to 

 45 mm., segments 33-42. Dorsum more or less covered with grayish 

 felt composed of feltage notosetae, mucus and mud; the sides are 

 flanked by the large iridescent brownish setae. El^^ra usually 15 

 (14-18) pairs, smooth, deeply notched on the outer attached borders. 

 Median antenna, tentacular cirri, and dorsal cirri long, filiform, in- 



FiGURE 1. — Aphroditidae, Laetmonice filicornis: a, dorsal view prostomium and tentacular 

 segment; h, parapodium of cirrigerous segment; c, tip of notoscta showing barbs; d, 

 neuroseta showing basal spur and unilateral fringe. 



