REPORT ON THE ANNELIDA. 
217 
and elongated. Dorsal cirrus short. Superior bristles with long delicate setose tips ; 
lower ventral falcate. 
The length of the sj)ecimen is about 38 mm., and its breadth at the widest region 
4 mm. 
The dorsum is deep brownish anteriorly, with a purplish iridescence, gradually fading 
into dull brownish at the commencement of the middle third, and becoming lighter as we 
proceed backward, while the pigment also gradually leaves the sides of the body and 
occupies the middle line. On the ventral surface the buccal and a few of the anterior 
segments are dusky ; the rest are pale. 
The head (PL XXXIV. fig. 14) is of a deep brownish-black hue and iridescent, the 
pigment being so developed that the eyes are at first sight invisible. At each side is a 
somewhat triangular pale patch, which gives the blackish dorsal area a definite spade-like 
shape. The posterior projection (of the dark pigment) has anteriorly an eye of average 
size, with the lens directed outward. Straight behind the foregoing on each side is 
another eye having a small lens nearly in the centre. The tentacles are considerably 
shorter than the head, the basal half being dark brown, the distal pale. The tentacular 
and other cirri are all pale and short, the longest reaching only to the commencement of 
the third bristled segment. The palpi are of considerable size, brownish-olive dorsally, 
with pale terminal bosses. 
The [first body, or buccal, segment is somewhat broad, indeed is about twice the 
breadth of the succeeding. On the ventral suface the olive-brown pigment is marked 
by pale dots, and these are also present on the under surface of the palpi and in each 
segment of the body. In the latter case these pores or specks form a row across the 
segment, about the anterior third, and are best seen anteriorly where the pigment is 
deepest. The paragnathi (VI.) of the basal ring of the proboscis constitute a 
continuous broad band (not isolated teeth) which runs transversely across each of 
the dorsal elevations of the organ in front of the palpi ; and in the middle line 
betAveen them is a single large black tooth (V.). The basal series (VII. and VIII.) on 
each side consists of a broad belt of isolated and well-marked teeth, somewhat less than 
those of Nereis cultrifera, Grube. In the artificially extruded proboscis three series 
occur dorsally, viz., a triangular median area (I.) of teeth (mostly flattened), somewhat 
less than those forming the basal ring ; and a lateral rhomboidal |)atch (II.) of similarly 
flattened teeth of the same size on each side. Three similar patches of teeth (III. and IV.) 
occur on corresponding parts on the ventral surface, but the central (HI.) is larger. 
All the teeth present the effects of attrition. The maxillse are dark broAvn from the tip 
almost to the base of the exposed part. If examined from the end, the tip as usual is 
seen to be bevelled on the dorsal edge. The dental margin of each maxilla seems to 
have been much worn, but in one six or seven points can be made out. 
There is no special differentiation in the anterior feet, which at the tenth 
(ZOOL. CHALI. EXP. — PABT XXXIV. — 1885.) LI 28 
