[589] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 295 
ETEONE, species undetermined. 
A small and slender species was dredged off Gay Head, in 19 fathoms, 
soft mud. 
Another very peculiar species of Hteone was obtained at Great Egg 
Harbor, New Jersey. In this the head is depressed and elongated, 
tapering, with short antenne. The anterior part of the body is round 
and with the lateral appendages very small, closely appressed, and not 
at all prominent, giving to this part of the body a smooth appearance; 
on,this part of the body the branchie are very small, lunate, sessile, 
closely appressed; farther back they become much larger, and rounded 
or ovate, while the setigerous lobe becomes prominent, and the sete 
much longer and more numerous. 
PoDARKE OBSCURA Verrill, sp. nov. Pl. XII, fig. 61. (p. 319.) 
Body convex above, flat below, with the segments deeply incised at 
the sides, moderately slender in full extension, but capable of great con- 
traction, tapering gradually to the caudal extremity, and less toward the 
head. Head small, broader than long, emarginate in front, sides forming 
rounded angles; posterior margin nearly straight. Antenne five, sub- 
equal, the outer pair articulated upon a short, thick basal segment; the 
odd median one is somewhat shorter, articulated upon a small basal 
segment, which arises in front of the anterior pair of eyes. Tentacular 
cirri long, slender, six on each side, two arising from each of the first 
three annulations, on each side; those on the middle are longest, those 
on the first shortest. Eyes four, small, red; those on each side close 
together, but those of the anterior pair are farthest apart. Proboscis 
with a large, swollen basal portion, and a smaller cylindrical terminal 
portion, the surface nearly smooth. Lateral appendages, or “ feet,’’ 
elongated, biramous. The upper branch is short, conical, bearing 
at its extremity a long, slender dorsal cirrus, nearly as long as the 
breadth of the body, or even exceeding it, and having a short basal 
joint; the sete of the upper ramus are very few and small. The lower 
branch is much larger and longer, thick at base, tapering somewhat to 
the obtuse end, from which a small, terminal, obtuse, papilliform process 
arises; the short, acute, ventral cirrus arises from about the terminal 
third, and is less than half as long as the dorsal cirrus; the sete are 
numerous and long, forming a broad, fan-shaped fascicle, in which the 
middle sete are considerably longer than the upper and lower ones, and 
inlength about equal to the setigerous lobe ; these setz are all compound, 
the middle ones having a very long, slender, acute terminal joint, and 
the shorter ones beneath having a much shorter terminal joint. Last 
segment small, rounded, bearing two long, slender anal cirri, much longer 
_ than the dorsal cirri. Color variable, most commonly very dark brown 
or blackish ; sometimes dark brown with transverse bands of light flesh- 
color between the segments, and two intermediate transverse whitish 
lines on each segment. 
