LOPADORHYNCHUS APPENDICULATUS. 439 
segments thirty-five ; width across the feet 1 mm. Colour in spirit pale yellowish brown. 
Foot with the pointed setigerous lobe projecting beyond the cirri, and the tip of the spine 
is just visible. The dorsal cirrus is pear-shaped, the ventral bluntly conical. Bristles with 
slightly curved shafts and a prominent process at the tip. The terminal piece is long and 
slender, two to three times as long as the free portion of the shaft (Southern). 
SYNONYMS. 
1909. Haliplenes magna, Southern. Irish Se. Invest., No. 3, p. 5, pl. 1, fig. 6, pl. u, figs. 7—11. 
1922. - » McIntosh. Ann. Nat. Hist., ser. 9, vol. ix, p. 2. 
Habitat—Procured in the tow-net at 700 fathoms off the West Coast of Ireland in 
February, lat. 54° 57’ N., long. 10° 51’ W. 
It is longer and has more numerous segments than either H. gracilis or H. isocheta. 
No member of the Lopadorhynchine—a group most nearly approaching the Phyllo- 
docidee—has been met with by the author in the British Seas from Shetland to the Channel 
Islands. Mr. Southern, however, by the enterprise and liberality of the Irish Fisheries 
Department, has described a few from the deep water off the West Coast of Ireland, and 
all were rare except two species of Pelagobia. 
LOPADORHYNCHUS APPENDICULATUS, Southern, 1909. 
Specific Characters—The dorsal tentacles on the head are twice as long as the ventral, 
which are not seen from the dorsum. The ventral tentacular cirri are somewhat longer 
than the dorsal, and on the basal piece of the ventral is a rudiment of the third pair; 
four eyes or none visible. Body 5—13 mm. long and narrowed posteriorly. Segments 
twenty-three, of which twenty-two are setigerous. Dorsally each segment is marked by 
a transverse ridge running along the middle, so as to have lozenge-shaped depressions in 
each inter-segmental area, and ridges also occur ventrally. First and second segments 
have only simple bristles, whilst the third have both simple and compound. The rest have 
only compound. Feet anteriorly modified, but the typical foot occurs at the seventh (where 
the body is widest), which has a pointed setigerous lobe with a spine, and near it a simple 
hooked bristle, and a rounded setigerous lamella with seventy-six compound bristles. The 
dorsal cirrus is conical, and larger than the ventral, the tips of both being within that of the 
setigerous lobe. The ventral cirrus has a filiform process at the tip, and the aperture of a 
multicellular gland near its base. Small granules of dark purple pigment occur on the inner 
sides of the cirri. 
The same pelagic form was described by Prof. Fauvel as L. uncinatus a few years 
later, and he emphasised the presence of the hooked bristles in the first two feet by his 
title to the species. 
SYNONYMS. 
1909. Lopadorhynchus appendiculatus, Southern. Irish Sc. Investig., 3, p. 7, pl. 1, figs. 12 and 13, 
| pl. iii, fies. 14—20. 
1915. . uncinatus, Fauvel. Bull. Inst. Oceanogr., No. 305, p. 3, 2 text-figs. 
1922. 5 appendiculatus, McIntosh. Ann. Nat. Hist., ser. 9, vol. ix, p. 2. 
