306 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [600] 
the dorsal cirrus of the upper ramus becomes longer, more slender, and 
ligulate. On the fifteenth segment a small, short, rounded ventral cirrus 
appears on the lower ramus, and farther back it becomes larger aud more 
prominent, and the setigerous lobe becomes bilobed. Anal segment 
rounded, obtuse; cirri long and slender. Color light red. 
Length up to 40™™; diameter, 2.5™™. 
Off Gay Head, 19 fathoms, soft mud; also from the deeper parts of 
Vineyard Sound. 
ANTHOSTOMA, species undetermined. (p. 508.) 
Another species, not well studied, was dredged in the deeper waters 
off Gay Head and Buzzard’s Bay. It differs from all the preceding in 
having eighteen anterior segments without branchie. 
NERINE AGILIS Verrill, sp. nov. (p. 346.) 
Body long and rather slender, anteriorly flattened, posteriorly more 
rounded. Head long conical, with a slender acute tip; mouth a trans- 
verse fissure beneath; eyes four, placed in front of the bases of the 
two large antenne, small, black, the anterior ones a little fartner apart; 
antenne long, slender, with thickened bases, placed on the dorsal 
surface of the head, with their bases contiguous. 
The branchie are slender, ligulate, and exist on all the segments 
except the first. On the first segment the “feet” are represented on 
each side by two small rounded lobes, bearing very small sete, and 
placed just below the bases of the antenne; on the succeeding twenty 
segments the lower ramus consists of a larger, somewhat semicircular 
lobe, bearing a broad cluster of slender, acute setz, and separate from 
the upper ramus, which consists of a thin foliaceous process joined to 
the branchial cirrus, but with a free terminal portion, and bearing a 
broad, comb-like cluster of long acute sete, nearly as long as the bran- 
chiew, and much longer than those of the ventral ramus. On the 
twenty-first setigerous segment a small papilliform ventral cirrus ap- 
pears on the lower ramus, and farther back it becomes more prominent 
and separate from the setigerous lobe. In the middle and posterior 
region the free portion of the cirriform lobe of the upper ramus is longer. 
Color reddish or brownish green anteriorly, light green on the sides; 
branchie bright red. Length up to 607"; breadth, 2™™; length of 
antenne, 12™™, 
Great Egg Harbor, New Jersey, on the outer beach, burrowing in 
sand, at low-water mark. 
SCOLECOLEPIS VIRIDIs Verrill, sp. nov. (p. 345.) 
Body long, slender, depressed; both the upper and lower surfaces 
flattened, of nearly uniform breadth throughout most of the length, 
abruptly narrowed at cach end, and somewhat tapering and more 
rounded posteriorly. Head with the central] plate longer than broad, 
