parapodia are so characteristic that the identity 

 is certain without the posterior region. This 

 fresh specimen is slightly different from Dr. 

 Pettibone's description of the type which had 

 been in the museum since 1883. 



The anterior dorsum is speckled with dark 

 pigment between the bases of the gills and the 

 postsetal lobes of the notopodia; the latter are 

 shown in Pettibone's Figure 81 e as equal in 

 thickness to the gills, but in this specimen they 

 are only one-third the thickness. A. alhatrossac 

 is unique among paraonids in having well- 

 developed postsetal lobes on the anterior neuro- 

 podia. Those of setigers 1-8 have a broad base 

 narrowing to a cirriform projection but in subse- 

 quent -segments in the branchial region, only 

 the broad base remains. Towards the end of 

 the branchial region the base flattens to form a 

 small postsetal lamella. 



Records. — One specimen off Beaufort in 200 

 m (*). 



Distribution. — Massachusetts; in 150-2,500 m. 



Aedicira belgicae (Fauvel, 1986) 



.Ariridea (Acdiciro } l>(l(/ir<i(. - Hartman, 1957: 



327. 

 Aedicira hchjicuc. - Day, 1963a: 424; 1967: 



563, Fig. 24.3. f-i. -Hartman, 1965a: 133. 



R( niarks. — While A. <ill>(itr(is.'<ac is easily dis- 

 tinguished by the possession of cirriform post- 

 setal lobes on the neuropodia of the first three 

 setigers, A. Ix l(/ic(t( merely has a minute papilla 

 on all neuropodia up to the middle of the bran- 

 chial region. Such papillae were not noted in 

 earlier descriptions and indeed they are easily 



overlooked, but they were found in South Afri- 

 can specimens of A. belgicae. Similar papillae 

 were found in Aricideafau veli but not in Aricidea 

 siiecica. It is possible that they occur in several 

 other paraonids. It may be noted that anterior 

 fragments of A. belgicae cannot be identified 

 as the special setae of .Aricidea spp. are often 

 confined to far posterior segments. 



/Jcrorc/.s.— Off Beaufort in 120-200 m (*). 



Distribution. — Atlantic from Greenland to 

 Uruguay, South Africa, and Antarctica; in 30- 

 4,950 m. 



Paraonis gracilis (Tauber, 1879) 



Parao)Ui< gracili.^. - Hartman, 1957: 330, pi. 44: 



Fig. 4, 5; 1969: 75, Fig. 1-3. 

 P(i)vo)ii.'< (Parao)ti.'<) gracilis. - Pettibone, 1963a: 



301, Fig. 79a-d. 



Paraonis gracilis gracilis. - Day, 1967: 566, Fig. 

 24.4. a, b. 



Records.— Off Beaufort in 120-200 m (21, *). 



Distribution. — Atlantic from Greenland and 

 Denmark to Antarctica and South Africa ; Bering 

 Sea; southern California; depth 5-2,000 m. 



Paraonis fiilgens (Levinsen, 1883) 



PiD-aoiiis fiilgeiis. - Fauvel, 1927: 71, Fig. 24 g-1. 

 Pai-aoiiis (Paraonis) fiilgens. - Pettibone, 1963a: 



302, Fig. 79 e-f. 



Records. — Cape Hatteras area, intertidal (18). 



Distribution. — North Atlantic from Denmark 

 to the English Channel and Maine to Massa- 

 chu.setts; intertidal to 10 m. 



FAMILY OPHELIIDAE 



Key to genera and species 



1 Body stout and maggot-shaped, not grooved ventrally. [Cirri- 



form branchiae on all setigers from second onwards. Lateral 

 swellings above and below posterior j)arai)odia (Tmvisia). 



Twenty setigei's and 3-4 achaotous jjreaiuii .segments] 



r Body fusiform or slender, grooved ventrally either from second 

 oi- 8th-10th setiger onwards 



2 Ventral groove and branchiae start on 8th-10th .setiger (Ophe- 



lia). I Body with 32 setigers with branchiae from 10th to 27th] . 



Trarisia parra 

 2 



Ophelia denticnlata 



94 



