600 REPORT OP COMMISSIONER OF FISH AND FISHERIES. 



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 and more 

 prominent, and the setigerous lobe becomes bilobed. Anal segment 

 rounded, obtuse ; cirri long and slender. Color light red. 



Length up to 40 mm ; diameter, 2.5 mm . 



Off G-ay Head, 19 fathoms, soft niud; also from the deeper parts of 

 Yineyard Sound. 



Anthostoma, species undetermined, (p. 508.) 



Another species, not well studied, w T as dredged in the deeper waters 

 off Gay Head and Buzzard's Bay. It differs from all the preceding in 

 having eighteen anterior segments without branchiae. 



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 j mouth a trans- 

 verse fissure beneath ; eyes four, placed in front of the bases of the 

 two large antennae, small, black ? the anterior ones a little farther apart ; 

 antennae long, slender, with thickened bases, placed on the dorsal 

 surface of the head, with their bases contiguous. 



The branchiae 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 setae, and 

 placed just below the bases of the antennae; on the succeeding twenty 

 segments the lower ramus consists of a larger, somewhat semicircular 

 lobe, bearing a broad cluster of slender, acute setae, 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 setae, nearly as long as the bran- 

 chiae, 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 ; 

 branchiae bright red. Length up to 60 mm ; breadth, 2 mm ; length of 

 antennae, 12 mm . 



Great Egg Harbor, New Jersey, on the outer beach, burrowing in 

 sand, at low- water mark. 



Soolecolepis 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 each end, and somewhat tapering and more 

 rounded posteriorly. Head with the central plate longer than broad, 



