HETERONEREIS. 115 
of the dorsal setigerous lobe bluntly conical, the lips of the 
ventral lobe very short, not projecting; the superior ligula 
somewhat arched, nearly as long as the dorsal lobe, whe- 
reas the inferior ligula is blunt and conical, about as long 
as the fusiform ventral cirrus. In the dorsal lobe there occur 
only two homogomph setose bristles of the ordinary shape, 
with a somewhat concave posterior border and its anterior 
one furnished with ciliae, as figured by Gravier in figure 6. 
In the ventral lobe the superior fascicle contains two of 
these homogomph setose bristles and some heterogomph 
falcate ones; its inferior fascicle however presents, besides 
some of these falcate bristles, two heterogomph setose ones 
with their terminal joint shorter, and a convex posterior 
border, as figured by Gravier in fig. 7. 

Fig. 3. Parapodium of 
7th setigerous segment. INS 
Fig. 4. Parapodium of 30th setigerous segment. 
The epitocous transformation of the posterior body-region 
commences at the 14 segment. Here (fig. 4) the feet 
present a conically elongated dorsal ligula with an incisura 
near its base, whereas the dorsal cirrus, a third longer, 
is provided with a dozen of papillae along its inferior 
border; these papillae disappear at about the 70‘ pair of 
feet. Behind the ligula there is a rounded lamella, convex 
in front, concave behind. The lip of the dorsal lobe conical, 
about as long as the dorsal ligula, with a narrow lamella 
along its inferior border. The ventral lobe bluntly conical 
with a large heart-shaped lamella, that is provided dorsally 
Notes from the Leyden Museum, Vol. XX XIII. 
