292 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [556] 
tips, and in length equal to half the diameter of the body ; posteriorly 
they become somewhat wider, with acute, curved tips. Caudal cirri 
small, narrow lanceolate, about as long as the posterior lateral Jamelle, 
or branchie. Color of preserved specimens pale greenish or bluish 
gray, with narrow annulations of golden brown, and iridescent. Length 
50™™, or more; breadth about 1.257". 
Vineyard Sound, 4 to 12 fathoms, among ascidians. 
EULALIA GRACILIS Verrill, sp. nov. 
Body very long and slender, with the segments deeply incised ; pos- 
terior segments elongated. Head small, elongated, truncate behind; 
posterior angles not prominent, oblong, tapering but little toward the 
front, which is obtusely rounded; sides not swollen. Eyes of moderate 
size, brown, situated close to the posterior margin of the head. The 
four frontal antenne are more than half as Jarge as the head, rather 
stout, tapering, and the head is slightly constricted behind them; odd 
median one, small, slender, inconspicuous, about one-third the length of 
the head, placed considerably in advance of the eyes. Tentacular cirri 
rather stout, the two upper ones longest, rather more than twice as long 
as the head; the posterior pair, when extended backward, reaches the 
fifth setigerous segment in preserved specimens; the two lower ones 
are considerably stouter and smaller, nearly equal, and are somewhat 
longer than the head in alcoholic specimens. Branchiz of the anterior 
segments short, oval, obtuse at the tip; posteriorly larger, elongated 
oval, leaf-like. Color light greenish brown or olive, with a row of dark 
brown spots along each side of the dorsal surface of the body. - 
Length up to 65™™; breadth about 1™™. 
Vineyard Sound, 6 to 14 fathoms, among ascidians and hydroids. 
This species is very active in its motions. In general appearance it 
resembles certain species of Phyllodoce, for which it might easily be 
mistaken, owing to the small size and translucency of the odd median 
antenna, which is not easily observed, especially with living specimens. 
The position of the tentacular cirri is, however, sufficient to distinguish 
the genus from Phyllodoce and Eumidia. The form of the head is quite 
peculiar, but somewhat resembles that of Phyllodoce gracilis, and also 
the preceding species. 
One specimen of the Hulalia gracilis was found in which fissiparity 
was apparently about to take place. In this, one of the segments was 
larger than the rest, and had developed a distinct pair of eyes. The 
specimen unfortunately died before the separation took place. 
if 
PHYLLODOCE GRACILIS Verrill, sp. uov. PL XI, fig. 56. (p. 494.) 
(?) Phyllodoce maculata A. Agassiz, Annals Lyceum New York, vol. viii, p. 333, 
fig. 53, 1566 (non Miillez, nec Girsted). 
Body very long and slender. Head longer than broad, decidedly 
cordate behind, with the posterior angles well rounded; the sides swell- 
