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The anterior third of the worm has a thick body-wall, very pale 
brown in colour, but posteriorly the wall becomes thin, colourless, 
and transparent. The prostomium, frontal tentacles, palps, and 
margins of the mouth, as well as the mid-dorsal region of the first 
four segments of the body, are tinged with a pale rose-purple. 
The five dorsal prostomial tentacles are smooth, ard have a well- 
marked ringed base; the three middle tentacles are of nearly equal 
size, reaching, when pressed back, to the twentieth segment or further. 
The laterals are much shorter, touching only the fifth chetigerous 
segment. Black pigment-masses are visible within the bases of the 
three middle ones, which may be eyes. 
The short nuchal tentacles (peristomial cirri) are only about half 
as long as the lateral tentacles. 
The first, or peristomial, segment is short, but the succeeding five 
are long, each having a length equal to about one-third of its width ; 
then the segments soon decrease in length, so that at the ninth they 
are only one-sixth of the width (but at the same time the width has 
increased) ; further back they become still shorter. 
The first six parapodia are long, widely separated, and the anterior 
ones are directed somewhat forwards. They measure about half the 
width of the body. Further back, and rather abruptly, as the seg- 
ments become shorter, the parapodia become compressed, and lie 
close together; they also decrease much in length. Thus the first 
cheetigerous segment has a body only 2mm. across, whilst the dis- 
tance from tip to tip of the feet is 5mm. At about the fifteenth 
segment the total breadth remains the same, but now the body itself 
is 4 mm. in diameter. 
Fig. 1. The first parapodium (enlarged): c, the two 
hooks below the bundle of chetez; dc, the dorsal 
cirrus; J, the lip-process of the chetophore ; 
ve, the ventral cirrus. 
The first parapodium carries a long dorsal cirrus, a long slender 
lip-process, and a long ventral cirrus, which does not reach the tip 
of the lip-process. There are but few cheetz in this foot; they are 
fine, simple, and pointed, with a few (8 or 4) stout, yellow, hooded, 
and hooked bristles, below the terminal hook of which there are 
numerous shorter denticulations of unequal size. The distal portion 
of the bristle, some distance from the apex, is semi-articulated at a 
nearly transverse line. (Fig. 5.) 
