INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 595 



two or three of the spatulate hooks; the latter are about half as long as 

 the former, slender toward the base, but gradually becoming broader 

 toward the end, which is twice as broad, obtusely rounded, and 

 curved back from about the middle ; the hooks are nearly terminal on 

 one side, the thin margin projecting beyond them. The basal lobe of 

 the "feet" is very small; the posterior lobe is small but prominent. 

 Color light red to dark red, somewhat' iridescent. 



Length up to 350 mm ; diameter, 0.05 mm to l mm . 



Great Egg Harbor, New Jersey, to New Haven and Vineyard Sound. 



Ninoe nigripes Yerrill, sp. nov. (p. 508.) 



Body elongated, slender, broadest a short distance behind the head, 

 at the middle of the branchiferous segments. Head depressed, elongated, 

 conical, blunt at end, about twice as long as broad. The branchiae are 

 represented on the first two setigerous segments by a short, flattened 

 lobe, arising from the outer and posterior face of the setigerous lobe. 

 On the two following segments the lobe is divided into two or three 

 parts ; on the fifth there are usually three, more elongated, round, and 

 more slender branchiae, which increase in number and length on the suc- 

 ceeding segments until there are five, six, or more long, slender branchial 

 filaments, which arise from the posterior face of the setigerous lobe, and 

 diverge, forming a somewhat fan-shaped or digitate group ; about the 

 twenty-fourth segment the number rapidly diminishes, and after the 

 twenty-seventh or twenty-eighth there remains but one small branchial 

 process. The setigerous lobe is prominent, obtuse, turned forward. The 

 setae are numerous on the branchial segments, and rather long, of various 

 shapes, but mostly bent, with an acute lanceolate point ; posteriorly they 

 are shorter and fewer, and mostly slender, margined setae, with hooks at 

 the spatulate end. Body flesh-color; the setae dark, often blackish; 

 branchiae bright red. 



Length of broken specimens, 20 mm ; breadth anteriorly, 2 mm . 



Vineyard Sound and Buzzard's Bay, and waters outside; in 8 to 29 

 fathoms, mud. 



Staurocephaltjs pallidus Verrill, sp. nov. (p. 348.) 



Body rather slender, convex above, flattened below, largest in the 

 middle, tapering slightly toward each end, composed of about seventy seg- 

 ments. Head small, depressed, rounded in front; antennae four, slen- 

 der, longer than the breadth of body, the two upper ones longer and more 

 slender than the lower ones, strongly annulated or beaded; lower ones 

 stouter, smooth, tapering. Eyes four, dark red; the posterior pair very 

 small, placed between the bases of the upper antennae; the anterior pair 

 farther apart, placed between the bases of the upper and lower antennae. 

 Anal cirri four, the upper pair slender and about twice as long as the lower 

 ones. Dorsal cirri elongated, slender, more than twice as long as the 

 setigerous lobe, absent on the first setigerous segment, very small on the 



