134 Prof. M‘Intosh’s Notes from the 
filament attached to the dorsal cirrus a little above its base. 
As far as the 16th foot it remains a simple, long filament. 
The 17th foot has a branched branchial process, and at the 
20th it has a single filament above the cirrus, and the ter- 
minal part is dichotomously divided—a feature of the 
species. At the 30th foot three divisions occur above the 
cirrus, which they considerably exceed in length, and 
then the tip is dichotomously divided into two still longer 
processes. The specimen terminated at the thirty-fifth seg- 
ment, and on this, so far as could be seen in the injured 
preparation, the number of gill-filaments was not less. 
The first three feet are much larger than the succeeding, 
and directed forward and outward as well as flattened 
laterally. Dorsally the 1st foot has a large and rather thick 
dorsal cirrus, which is bent downwards ; into its base pass 
three spines. A bluntly conical setigerous region follows, 
having a short tapering papilla at the tip. No bristles are 
present. The ventral cirrus is of considerable size, some- 
what fusiform in outline, and shifted so that it adjoins the 
side of the mouth. 
The next two feet (2nd and 3rd) are similar in general 
structure, the size slightly increasing, and the ventral cirrus 
of the 3rd foot is both larger and more flattened. In none 
do bristles project beyond the skin, though they occur 
internally below the spines. 
The 4th foot, like the foregoing, is more or less ventral 
in position. Its dorsal cirrus is large and subulate, the 
setigerous region has short bristles projecting from its edge, 
and the ventral cirrus is a lanceolate or conical lobe imme- 
diately beneath it. 
A marked change occurs in the 5th foot, for conspicuous 
glistening bristles project from the setigerous region. The 
dorsal cirrus is somewhat less though still prominent, the 
setigerous region has a posterior flap, and the ventral cirrus 
is visible inferiorly as a short process. The dorsal bristles 
are translucent and finely tapered, with narrow wings and 
serrated edges, as in the feet behind. he ventral are 
equally translucent, have their shafts slightly curved and 
dilated at the bevelled end, from which a long tapering 
blade extends distally. The ventral cirrus is included in the 
low glandular pad behind the foregoing region, and the 
dorsal cirri diminish in size. 
The 10th foot (PI. X. fig. 5) has a subulate dorsal cirrus 
with a ventral “ bite,’ followed by a swelling, from which 
it tapers to the point. It is supported by a group of slender 
spines. The setigerous region has two strong spines, the 
