28 
AUSTRALASIAN ANTARCTIC EXPEDITION. 
Passing backwards from the prostomium are two conspicuous white broad ridges, 
the “ epaulettes ” or “ ailerons,” which cross over the peristomium and two following 
segments’]ust'’above the bases of the dorsal cirri and end at the hinder margin of the third 
segment. Each of these structures is grooved along its upper surface, and its inner 
margin is thickened, rounded, and opaque white; they show well against the pigmented 
surface of the dorsal surface. Though so conspicuous in the worm viewed by reflected 
light, they are scarcely visible in a stained specimen mounted in Canada balsam. 
The peristomial dorsal cirri are about as long as the prostomial tentacles. The 
ventral cirri of this segment are short. On the next two segments the dorsal cirri are 
longer still, though their exact length is difficult to estimate as they are coiled. 
The dorsal cirri are cylindrical, smooth, and though presenting irregular con¬ 
strictions here and there, are not truly moniliform; each is marked by a streak of 
brown pigment along its external and internal faces. 
On the ventral surface there is, on each side, a series of segmentally arranged 
great oval glandular pads such as McIntosh describes for his Autolytus maclearanus. 
I suggest that these glands are responsible for the membranous tube in which the worm 
lives. 
The anterior dorsal cirri are as long as the width of the body, but decreases in 
length posteriorly, so that in the mid-body, their length is about half this width, and 
they become still shorter further back. 
The form of the parapod (fig. 7), and the arrangement of the chsetse are as Gravier 
has described, though the ventral glandular pad is more definitely constricted off from 
the body on the ventral surface than his figure indicates. The parapod is supported by 
a couple of acicula lying close together side by side ; and carries, besides the bundle of 
compound chastse, one or two capilliforms ; it is, however, only exceptionally that one 
can detect them owing to their fragility. 
The cup of the “ gomphotrich ” or compound chseta (fig. 8), is characteristically 
striated on one side, the appendix is, as usual, short with two unequal teeth, of which the 
distal is slenderer than the other; the latter presents slight differences according to its 
position in the bundle ; in the lower chaitge it is sharply pointed as is the distal tooth; 
whereas in the upper ones it is usually bluntly rounded as if subject to wear. The form 
of the appendix does not quite agree with the figure given by. Gravier (p. 8, fig. 1), as I 
find that there are no serrations below the teeth. It seems also to be somewhat broader 
in proportion to the length than is shown by that figure. 
The pharynx, which Gravier was unable to study, extends back to the end of the 
7th segment, where it bends forwards on itself, then turns back to enter the “ stomach ” 
(or proventriculus), which occupies apparently segments 10-14 as seen in a specimen 
that T dissected; but in a mounted specimen of smaller size, this stomach occupies 
segments 7-10. Whether this difference is due to age or to a disarrangement during 
dissection I cannot say. 
