PELAGOBIA LONGICIRRATA. 435 
Habitat.—-Dredged in Clew and Dingle Bays on a bottom of sand and shells or gravel 
(Southern). 
A remarkably elongated form with long setigerous processes, long segments, and peculiar 
bristles. The head is twice as long as broad, and has two eyes, devoid of lenses, in the 
postero-lateral angles. The body is minute (6 mm.) and has eighty segments. The colour 
is yellowish or dark green. The first segment has a single pair of long, tapering cirri, the 
second has two pairs, but there are no traces of spines or bristles. The third segment has 
a setigerous lobe and a ventral cirrus. The setigerous lobe generally is bluntly pointed, 
and has a spine and four bristles; whilst the dorsal cirri are small and fusiform ; ventral 
cri longer. ‘Three of the bristles in each foot are compressed, the shaft being thick, curved, 
bevelled (but not swollen at the tip) and bifid. 
Genus PELAGOBIA, Greef, 1879. 
Head with four tentacles and two eyes. Four tentacular cirri, and elongated feet ; 
dorsal and ventral cirri cylindrical. Proboscis short; alimentary canal straight. Body 
slender, with about twenty-four segments in the longest example, and terminating in two 
caudal styles. Bristles with two spikes at the base of the serrated, tapering, terminal region. 
PELAGOBIA LONGICIRRATA, (reef. Plate CX XXIV, figs. 4 and 4a. 
Specific Characters—Head with two eyes and four tentacles, all arising in front of the 
eyes. Four tentacular cirri. Proboscis short and rounded. Body elongated (7°5 mm.), 
more tapered posteriorly than anteriorly, twenty-four or more segments. Feet well de- 
veloped. Dorsal and ventral cirri cylindrical and shghtly tapered. Bristles with trans- 
lucent straight shafts dilated distally, and a broad, tapering, serrated terminal piece hooked 
at the tip. Pelagic. 
SYNONYMS. 
1879. Pelagobia longicirrata, Greef. Zeitschr. f. wiss. Zool., Bd. xxxui, p. 247, Taf. xiv, figs. 28—25. 
1886. ns , Viguier. Arch. Zool. Expér., 2 sér., t. iv, p. 377, pl. xxi, figs. 1—13. 
1895. % Reibisch. Phyllodoc. u. 'yphloscol. Plankton-Exped., p. 21, Taf. ii, 
figs. 1—9. 
1897. a5 .. Vanhoffen. Gronl. Exp. der Gesellschaft f. Erdkunde in Berlin, Bd. u1, 
p. 217. 
1905. 55 a Reibisch. Nord. Plank., x, p. 3. 
1909. 5 . Southern. Irish Sc. Invest., iii, p. il, pl. 1, fig: 1. 
1916. ¥ x Fauvel. Camp. Sc. Monaco, Fase. xlviii, p. 61, pl. i, figs. 6 and 7. 
1921. es 3 McIntosh. Ann. Nat. Hist., ser. 9, vol. viii, p. 294. 
Habitat.—Post-larval examples procured in February in the Irish Sea (Chadwick). 
Various examples of the adult were obtained by the S.S. “ Helga,” of the Irish Fisheries 
Department, chiefly at considerable depths off the West Coast of Ireland (Southern). 
225 
