600 KEPORT OF COMMISSIONER OF FISH AND FISHERIES. 



the dorsal cirrus of tlie 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""'^; diameter, 2.o'""\ 



Oti" Gray 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 branchiae. 



Nerine agilis Verrill, sp. nov. (p. 340.) 



Body long and rather slender, anteriorly iiatteued, 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 antenna?, small, black, the anterior ones a little farther apart ; 

 antenuce long, slender, with thickened bases, j)laced on the dorsal 

 surface of the head, with their bases contiguous. 



The branchiaj 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 setie, and 

 placed just below the bases of the antennaij on the succeeding twenty 

 segments the lower ramus consists of a larger, somewhat semicircular 

 lobe, bearing a broad cluster of slender, acute seta?, and separate from 

 the u[»per 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 setie, nearly as long as the brau- 

 chiji?, 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 i^rominent 

 and sej)arate 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 anteriorh", light green on the sides; 

 brauchia) bright red. Length up to GO"""; breadth, 2°^"^; length of 

 antenn.ii, 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 each end, and somewhat tapering and more 

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



