tt 
Fig:. 2.. The fourth parapodium, on Fig. 3.. A parapodium from the mid- 
the same scale as Fig. 1. ,. body,,on the same scale. Letters 
as in Fig. 1. 
_ The fourth foot is similar in form, and has two similar chete. 
After the sixth foot the ventral cirrus becomes shorter and is reduced 
to a scale or pad. ; 
But further back the foot exhibits several differences: the dorsal 
cirrus is smaller; the ventral is represented by a slight pad; the 
whole foot is less prominent. Below the bundle of cheetz are two 
stout hooks, stouter than those of the earlier parapodia: they have’ 
a shorter but wider hood, and the distal region is not articulated ; 
the tip is curved and bears two prongs, the upper being much smaller 
than the lower, which is bifid. I did not note exactly where the 
change in the form of the bristles occurs, but it exists: already in the 
fifteenth foot. (Fig. 4.) 
Fig. 4. One of the stout hooks of Fig. 5. A characteristic, hook. from 
the mid-body. the anterior parapodia. 
These bristles, both of the anterior and posterior feet, agree closely 
with those described and figured by McIntosh for Onuphis (Nothria) 
tenuisetis. 
The gills commence on the second foot and extend throughout 
the body. The first consists of a single slender filament springing 
