302 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [596] 
second, but well developed on the third. Sete rather long and slender. 
Color pale yellow, with red blood-vessels showing through anteriorly. 
Length, 50"; breadth, 2"". This species moves like a Nereis. 
Near New Haven light-house, in sand, at low-water mark. 
RHYNCHOBOLUS AMERICANUS Verrill. Plate X, figs. 45,46. (p. 342.) 
Glycera Americana Leidy, op. cit., p. 15, Pl. 11, figs. 49,50, 1855; Ehlers, Borsten- 
wiirmer, vol. i, p. 668, Pl. 23, figs. 43-46, 1868. 
Charleston, South Carolina, to Long Island Sound and Vineyard 
Sound. Low-water mark to 10 fathoms. 
I follow Claparede in adopting Rhynchobolus for those species of the 
old genus Glycera which have the proboscis armed at the end with four 
hooks or fangs. ; 
RHYNCHOBOLUS DIBRANCHIATUS Verrill. Plate X, figs. 43, 44. (p. 
341.) 
Glycera dibranchiata Ehlers, op. cit., pp. 670-702, Pl. 24, figs. 10-28, 1868. 
Great Egg Harbor, New Jersey, to Long Island Sound; Vineyard 
Sound; and Massachusetts Bay. Low-water mark to 8 fathoms. 
Ehlers has given a very full anatomical description of this species. 
FONE GRACILIS Verrill, sp. nov. (p. 508.) 
Body very slender, terete; surface iridescent. Head elongated, acutely 
conical, composed of eight distinct, rounded annulations, the basal one 
with a pair of minute reddish eyes; antennee four, slender. Feet prom- 
inent, elongated, more than equal to half the diameter of the body; they 
are uniramous on about thirty-two segments of the anterior part of the 
body, and bilobed, with a small obtuse dorsal cirrus; the upper lobe 
is prominent, more elongated than the lower one, both cylindrical,obtusely 
pointed; sete compound, in two smali fascicles, long, the free part ex- 
ceeding the entire Jength of the foot. On the posterior half of the body 
there is a small, slightly elevated, mammilliform upper ramus, above 
the base of the lower ramus, and entirely separate from it, containing 
two or more small, acute, dark sete, which project but slightly; the 
lower ramus is deeply bilobed, the lobes elongated, round, the upper 
one longest, the lower one acute; on the posterior side of the base of the 
upper lobe there is a minute, rounded setigerous lobe, and at the june- 
tion of the two lobes, on the posterior face, there is another small setig- 
erous lobe; the setv are long and slender, acute, many of them curved, 
arranged in small fascicles. ' 
Length, 20°"; diameter less than 1™”. 
Off Gay Head, 19 fathoms, in soft mud. 
ARICIA ORNATA Verrill, sp. nov. (p. 344.) 
Body rather stout, composed of numerous very short segments, much 
depressed and flattened anteriorly, strongly convex beneath in the mid- 
dle region, flattened above throughout; breadth nearly the same 
