INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 589 



Eteone, species undetermined. 



A small and slender species was dredged off Gay Head, in 19 fathoms, 

 soft mud. 



Another very i>eculiar species of Eteone was obtained at Great Egg 

 Harbor, New Jersey. In this the head is depressed and elongated, 

 tapering, with short aiiteume. 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 i)art of the body the branchiie 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 setoe 

 much longer and more numerous. 



PoDARKE OBSCUEA Yerrill, sp. nov. PL XII, fig. Gl. (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 loug, emarginate in front, sides forming 

 rounded angles; posterior margin nearly straight. Antennie 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 set?e 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 seta3 are 

 numerous and long, forming a broad, fan-shaped fascicle, in which the 

 middle seta3 are considerably longer than the upper and lower ones, and 

 in length about equal to the setigerous lobe ; these seta^ 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. 



