REPOJRT ON THE ANNELIDA. 
105 
structure of tlie dorsal bristles, but bis figures are so indefinite that no oj)inion can be 
expressed concerning the ventral. 
Hermadion, Kinberg. 
Hermadion kerguelensis, n. sp. (PI. XI. fig. 5 ; PI. XII. fig. 1). 
Hermadion longieirratum, Kinberg, Baird, Proc. Linn. Soc. Lond., vol. viii. p. 196. 
Hermadion longicirraius, Kinberg, MTntosb, Transit of Venus Exped., p. 258, pi. xv. figs. 1-4. 
Habitat. — Many specimens of this large species were dredged at Station 149, off 
Kerguelen Islands, January 9, 1874; lat. 49° 8' S., long. 70° 12' E. ; Accessible Bay; 
depth, 20 fathoms ; volcanic mud. Also at Station 149b, off Royal Sound, Kerguelen, 
January 17, 1874 ; lat. 49° 28' S., long. 70° 30' E. ; depth, 25 fathoms; surface tempera- 
ture, 40°'5 ; volcanic mud. Station 149c, Balfour Bay, Royal Sound, Kerguelen, 
January 19, 1874; lat. 49° 32' S., long. 70° 0' E. ; depth 60 fathoms; volcanic mud; 
large numbers. Port William, Falkland Islands, in 5 to 10 fathoms. 
This is one of the largest of the Polynoidse, specimens measuring upwards of 80 mm. 
in length and about 30 mm. (inclusive of the bristles) in breadth. 
The body is elongated and narrowed posteriorly, the greatest transverse diameter 
occurrmg a little behind the anterior third. It is not much flattened. The number 
of bristled segments ranges from forty -two to forty -five. 
The head (PI. XI. fig. 5) is comparatively small, devoid of the anterior peaks on 
each side, and in the preparations the eyes are somewhat indistinct. Two are situated 
laterally just in front of the nuchal fold, and two on the anterior region, the latter 
being only partially seen from the dorsum. They are most distinct in young specimens. 
The basal portion of the tentacle is much developed, and the column has the usual 
enlargement below the filif orm tip. The tentacle is pale beyond the basal region, then 
becomes tinted towards the enlarged part — the latter and the filiform tip being pale. 
A series of short clavate cilia are sparsely scattered over its surface with the exception 
of the filif orm termination. It is interesting to observe that the basal processes of such 
structures are never furnished with papillae or cilia, whereas the distal parts are so very 
frequently. The former would seem to belong to the same system as the cuticular 
surface in the neighbourhood. The bases of the antennae are considerably below 
the tentacle, and thus the appearances materially differ from those in Lepidonotus 
in which, likewise, there are no anterior peaks. The antennae are like the tentacle 
on a smaller scale ; and the tentacular and dorsal cirri are similar. The palpi are 
brownish, of average length, and pointed at the tip. Minute cilia with the ends 
truncate rather than clavate occur on their surface, from a little above the base almost 
to the tip. 
(ZOOL. CHALL. EXP. — PART XXXIV. — 1885.) 
LI 14 
