114 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 92 
from Peru in 10-40 fathoms. JW. circinata is herein referred to WV. 
macroura, it represents the first record of its distribution north of the 
equator. 
Other collections deposited in the Museum originate from “Massa- 
chusetts Bay, Sept. 21, 1878. Sta. 221. 37-38 fms.” and “Bay of 
Fundy, 1872. 6022.” 
Family LUMBRINERIDAE 
Genus LUMBRINERIS Blainville 
LUMBRINERIS ACUTA (Verrill) 
Figure 10, a-d 
Lumbriconereis acuta VERRILL, 1875, p. 39; 1882, p. 314 (U.S.N.M. No. 13392; 
off Block Island, R. I.). 
This is a slender, greatly attenuate form, about 30-40 mm. long. 
The most conspicuous feature is the greatly elongated, slightly de- 
pressed, prostomial lobe (fig. 10, a) ; eyes are lacking. The peristomial 
ring is faintly biannulate. Segments are well marked, smooth, uni- 
annulate; they are about as long as wide, or only half that long. 
The maxillary apparatus has carriers that are proportionately 
enormous and approximately triangular in outline. Forceps are 
robust, with two blunt teeth; maxilla II has three blunt teeth; 
maxilla III has a single tooth; maxilla IV has one tooth (fig. 10, ¢). 
Mandibles are about as long as the maxillary apparatus; the bases 
are slender, the anterior end flaring. 
Parapodia are short, inconspicuous in the anterior region, with 
short simple lobes; posteriorly the postsetal lobe elongates slightly 
but is nowhere markedly developed. Setae are simple only; in an- 
terior segments the bilimbate setae have wings that are rather broad 
(fig. 10, 6). Hooded hooks are present in median segments, ac- 
companied with some limbate setae; these have a short, hooded area 
with obscure denticulations distally (fig. 10, d). 
In its peculiarly elongated prostomium Z. acuta greatly resembles 
L. mucronata Ehlers (1912, pl. 12, fig. 10) from the mouth of the 
Congo River. In this, however, the distal ends of the hooded hooks 
are markedly bidentate; also, the maxillary apparatus is otherwise. 
L. acuta is known only from New England. 
LUMBRINERIS GRANDIS (Treadwell) 
FicvgeE 10, h, k, 1 
Lumbriconereis grandis TREADWELL, 1906, p. 1170 (U.S.N.M. No. 5214; Hawaii). 
There is a single specimen in three pieces, lacking a posterior end. 
The prostomial lobe is thick, conical, about as long as wide. Many 
of the anterior setae are broken away, but a seventh parapodium 
