302 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [596 J 



second, but well developed on the third. Setae rather long and slender. 

 Color pale yellow, with red blood-vessels showing through anteriorly. 



Length, 50 mm ; breadth, 2 mm . This species moves like a Nereis. 



Near New Haven light-house, in sand, at low-water mark. 



, EHYNCHOBOLUS AMERICANUS Yen-ill. Plate X, figs. 45, 46. (p. 342.) 



Glycera Americana Leidy, op. cit., p. 15, PL 11, figs. 49,50, 1855; Ehlers, Borsten- 

 wiirrner, vol. i-, p. 668, PL 23, figs. 43-46, 1868. 



Charleston, South Carolina, to Long Island Sound and Yiueyard 

 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 faugs. 



* KHYNCHOBOLUS DIBRANCHIATUS Yerrill. Plate X, figs. 43, 44. (p. 

 341.) 



Glycera dilrancldata Ehlers, op. cit., pp. 670-702, PL 24, figs. 10-28, 1868. 



Great Egg Harbor, New Jersey, to Long Island Sound ; Yiueyard 

 Sound ; and Massachusetts Bay. Low- water mark to 8 fathoms. 

 Ehlers has given a very full anatomical description of this species. 



EONE GRACILIS Yerrill, sp. nov. (p. 508.) 



Body very slender, terete ; surface iridescent. Head elon gated, acutely 

 conical, composed of eight distinct, rounded annulations, the basal one 

 with a pair of minute reddish eyes ; antennae 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; seta3 compound, in two small fascicles^ long, the free part ex 

 ceeding the entire length of the foot. On the posterior half of the body 

 there is a small, slightly elevated, mammilliform upper rainus, above 

 the base of the lower ramus, and entirely separate from it, containing 

 two or more small, acute, dark setae, 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 junc 

 tion of the two lobes, on the posterior face, there is another small setig 

 erous lobe ; the setse are long and slender, acute, many of them curved, 

 arranged in small fascicles. 



Length, 20 mm ; diameter less than l mm . 



Off Gay Head, 19 fathoms, in soft mud. 



ARICIA ORNATA Yerrill, 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 



