398 
KJERSCHOW AGERSBORG 
Fig. 5 
a, Pro- 
boscis of Tricho- 
cyclus hansineen- 
sis [sp. noc^.), with 
vibratile brislles; 
è, oral view. 
the neck. They are almost evenly curved on the anterior 
and posterior borders, but the latter bears many large and 
small non-motile cirrhi; the distal border is tri-lobed. The 
fins were frequently in motion but often folded up against 
the sides of the neck. When they were in 
motion they were worked in an undulating 
fashion, giving at times the appearance of 
the figure 8. The remainding part of the 
foot consistsof a small lanceolate lobe situat- 
ed on the ventral side of the neck and bet- 
ween the base of the epipodia with the taper- 
ing point forward; the caudal border is gent- 
ly curved, and it extends almost across the 
width of the neck. This mesopodium is split 
in the mid-ventral line two thirds of its 
length; it is joined at its tapering ante¬ 
rior point which extends cephalad of the 
ciliated groove of the head. A small meta- 
podium is présent in the mid-central région 
of the neck, just caudad, but close to the mesopodium. 
Body:— The trunk of the body passes imperceptibly into 
the neck dorsally and extends laterally over the base of the 
fins forming in that way a socket for the latter. The trunk 
is everywhere set with round and ovoid bodies which are 
largest and uniformly arranged in the dorsal région of the 
neck. These bodies seem tobe glandular in fonction as from 
them exudes a slimy substance. Around, and past the 
middle of the body, is the middle-ciliated-groove, the 
anterior border of which extends out from the body as a fine, 
acute, edge; the complément of which is obtuse, and not so 
large. From the médian ciliated groove, the body tapers 
gently until about one half the distance from the caudal end. 
On the middle of this caudal part, is the posterior ciliated 
groove. The anterior half of the constricted caudal portion 
is cylindrical and in its walls the glands are less numerous, 
and fine fibres which corne from the trunk are seen branching 
in this région and pass into the ciliated groove. The caudal 
part, past the ciliated groove of this région, is very glandular 
