Pionosyllis cf. uraga Imajima. 1966 



FigTJre 4k-ni 



Desc)ipti())i. — Body incomplete, with only 35 

 segments measuring 3 mm. No color markings. 

 Prostomium with two pairs of eyes and three 

 slender antennae; the median arising far back 

 and twice as long as laterals. Palps broad, 

 flattened, bent downwards, quite separate ba- 

 sally. Pharynx long with a smooth margin and 

 a small dorsal tooth a quarter the way back. 

 Proventriculus as long as pharynx with 30 rows 

 of points. Parapodia with stout, blunt setigerous 

 lobes bearing broad ventral cirri mainly fused 

 to ventral margin. Dorsal cirri alternately very 

 long and slender (Figure 4k), up to 1.5 times 

 segmental breadth or short and only half seg- 

 mental breadth. Setae characteristic and of 

 two types, 3 to 5 superior ones (Figure 41) with 

 very long blades tapering to fine tips and 7 to 

 10 inferior ones (Figure 4m) with broad, bi- 

 dentate chopper-shaped blades without mar- 

 ginal spinules. Apical tooth small and incon- 

 spicuous, secondary tooth larger and hooked. 

 Acicula with faintly knobbed tips. 



ReiHarks. — The long tapered blades of the 

 superior setae are remini.scent of the subgenus 

 Lai/f/crhanKia but the latter has articulated 

 dorsal cirri and here they are all quite smooth. 

 This single broken specimen from North Caro- 

 lina closely resembles PidiKixyllis tiragu as de- 

 scribed by Imajima, (1966c: 114, Fig. 37 a-g) 

 from Japan. However, the blades of the setae 

 lack spinules, the shaft-heads are not serrated 

 and the heads of the acicula lack a band of 

 microscopic spinules. More material is required 

 before the identification can be confirmed. 



Records. — One specimen from 120 m off 

 Beaufort (*). 



Exogone gemmifera (Pagenstecher, 1862) 



Exogone geiuDiifcra. - Fauvel, 1923: 305, Fig. 



117 a-d. - Imajima, 1966a: 397, Fig. 2 a-h. - 



Day, 1967: 274, Fig. 12.10. p-u. 

 Exogo)ie )iai(liua. - Pettibone, 1954: 258, Fig. 



28 e. 



Dc!<cripti(ii/. — Body 2-4 mm long with 24-33 

 setigers. Prostomium with two pairs of eyes 



and three antennae, the median just longer than 

 the laterals. Palps short, completely fused and 

 rounded anteriorly. Pharynx with an anterior 

 dorsal tooth. Proventriculus extending through 

 two segments. One pair of small tentacular 

 cirri. Dorsal cirri small and ovoid and present 

 on all segments except setiger 2. Ventral cirri 

 distinct. Setae including a superior simple seta 

 with an obliquely ti^uncate tip, one or two com- 

 pound setae with long, daggerlike blades and 

 four or five compound setae with swollen serrate 

 shaft-heads and minute bidentate blades with 

 the secondary tooth larger than the terminal 

 one. An inferior simple setae in posterior seg- 

 ments. Mature females carrying developing em- 

 bryos ventral ly. 



RcDKD'ks. — The description of E.i'ocjom nai- 

 diiui Oersted given by Pettibone (1954) agrees 

 perfectly with that of E. gem itiifiro which she 

 includes in the synonymy of E. naidliia. How- 

 ever. Fauvel and more recent workers do not 

 regard the two as synonymous and until the 

 types have been examined, I prefer to use the 

 better known name. 



Records.— OK Beaufort in 18-40 m (20, *). 

 This is a new record for the Atlantic coast of 

 the United States. 



Distribiitii))). — Arctic Seas; North Atlantic 

 from France to North Carolina; Mediterranean; 

 South Africa; North Pacific from the Bering 

 Sea to Mexico and Japan to the Yellow Sea; 

 intertidal to 225 m. 



Exogone dispar (Webster. 1879) 



E.rogoiie dispar. - Hartman, 1945: 16, pi. 2: 

 Fig. 7, 9, 10. - Pettibone, 1963a: 130, Fig. 

 35 d. 



Exogone clarator Ehlers, 1913: 485, pi. 33: Fig. 

 1-6. - Day, 1967: 272, Fig. 12.10. a-f. 



Exogone unifon)iis Hartman, 1961: 73, pi. 6: 

 Fig. 1, pi. 7: Fig. 1-4. - Imajima, 1966a: 

 400, Fig. 4 a-j. - McCloskey, 1970: 24. 



Remarks. — A direct comparison of specimens 

 of E. clavator from South Africa with specimens 

 of E. dispar from North Carolina showed that 

 the two are identical. Imajima states that E. 

 uiiifo)'niis differs from E. dispar in having fal- 

 cigerous setae with fewer teeth on the cutting 

 margin. His Figures 4 f. g, h show that the 



33 



