60 Annelida CJimtopoda 
back of the origin of the tentacles are two fans of setae, 
shorter than those on the next segment, but otherwise 
similar to them. Each fan has a little rounded lobe back 
of it. These lobes are close together, similar to each other 
and to the ventral lobes generally, but smaller. The 
second segment bears a pair of short branchiae, which in- 
crease in length on the following segments, till they nearly 
touch each other across the back. The anterior branchiae 
bear afoliaceous lobe, with a short, free, rounded extremity 
(f. 104). This lobe is at first divided into two by an in- 
cision reaching nearly to the branchia ; the lower lobe 
being double the length of the upper one. Further back 
the incision disappears, while the free portion of the lobe 
becomes longer and pointed (f. 105). 
Ventral rami. On the anterior feet the ventral ramus 
is a rounded lobe of the same structure as the branchial 
lobe. At about the 25th segment, this lobe is nearly 
divided into two by a deep incision (f. 106) ; further back 
this division becomes complete (f. 107) leaving a squarish 
lobe between the dorsal and ventral rami, not attached to 
either. The setse project in front of the lower lobe. On 
the anterior feet the dorsal setse fall a little short of the 
outer margin of the lobe ; afterwards they project slightly 
beyond it. They are numerous, arranged in a fan, delicate, 
bilimbate, the margins being very narrow. The anterior 
ventral setse are like the dorsal (f 108). At about the 
25th segment a few bidentate setse, with a broad membrane 
extending about one-third of their length, replace some of 
the double-margined setse of the ventral ramus (f. 109). 
Still further back the bilimbate setse disappear entirely from 
the lower ramus, being replaced by narrower setse with a 
single margin (f. 110). 
Description and figures from alcoholic specimens. Pos- 
terior segments not seen. Segments remaining, 40. 
Length, 20'""; diameter, 15°"". 
