ANNELIDA FROM BERMUDA. Silo 
ventral lingula retains its length but loses in diameter. The ventral 
cirrus remains unchanged. Other specimens, certainly belonging to 
this species, have the feet more delicate, the dorsal and ventral cirri a 
trifle longer. (Figs. 24%, 267.) 
Anal cirri filiform, as long as the last ten segments. 
In the dorsal ramus there are from 6-10 sets (Fig. 28) with long 
delicate appendix, the terminal points of the stem equally long. These 
setes form the upper part of the ventral bundle, while its lower part is 
made up of falcate sete, appendix short (Fig. 27), terminal points of 
stem very unequal in length. 
Body convex above, slightly convex below; of nearly uniform width 
for the anterior three-fourths; tapering slightly along the posterior 
fourth, but appearing to retain a uniform diameter, on account of the 
lengthening of the feet. A few of the anterior segments also taper 
slightly. 
Length, 35-50™™, 
Width, 3-4™, 
Nuinber of segments, 50-80. 
NEREIS GRACILIS, 2. sp. 
(Plate IX, Figs. 29-35.) 
Head wide (Fig. 29), slightly convex laterally and above, a little con- 
cave behind, produced in front to form the bases of the antenne. 
Eyes quite large, placed well in front; those on-either side nearly in 
contact. 
Antenne with long cylindrical basal articles, produced from the head, 
just within the anterior eyes; they are long, conical. 
Palpi long and stout, curved inward near the base; terminal articles 
quite long; in contracted specimens they fall a little short of the an- 
tenne. 
Proboscis and jaws not seen. 
On the specimen figured, which was otherwise in good condition, the 
posterior superior tentacular cirri were both lost. On another specimen, 
much injured, this cirrus remained, and was found to be very long, 
reaching back to the thirty-fourth segment, being nearly three times as 
long as the anterior superior cirrus, which reaches to the twelfth seg- 
ment; the inferior cirri are much shorter. 
Buccal segment produced forward along its anterior margin, encroach- 
ing a little on the head; its length, in aleoholic specimens, is about 
that of the next segment. 
