326 REPORT OF COMMISSIONER OF FISII AND FISHERIES. [620] 
SERPULA DIANTHUS Verrill, sp. nov. (p. 322.) 
Body elongated, gradually attenuated to the posterior end; the pos- 
terior region considerably flattened; dorsal surface covered with 
minute papille and having a finely pubescent appearance under a lens. 
Collar broad and long, in living specimens sometimes one-third as long 
asthe bedy; the posterior portion free dorsally, and in expansion about as 
long as the attached portion, extending backward and gradually narrow- 
ing to the end; the margins thin and undulated ; the anterior border is di- 
vided into a broad revolute dorsal lobe, with an undulated margin, and 
two narrower lateral lobes, which are broadly revolute laterally, with the 
margin rounded and nearly even. Seven segments bear rather large 
fascicles of long, acute setz. The first fascicle is remote from the next, 
and directed downward and forward, with the setz longer than in the 
others; the six following fascicles are broad, and are directed downward 
and backward. The uncinate setz form long transverse rows anteriorly, 
but toward the posterior end they form shortrows. Operculum funnel- 
shaped, longitudinally striated externally, with a long, slender pedicel ; 
the upper surface is concave, with about thirty small, acute denticles 
around the margin; an inner circle of about twelve long, slender 
papille, incurved at tips and united at base, arises from the upper 
surface of the operculum. On the left side is a small rudimentary oper- 
culum, club-shaped at the end, with a short pedicel. Branchiz are long 
rather slender, united close to the base, about eighteen on each side, in 
mature specimens, those toward the ventral border considerably longer, 
than the upper ones; tips naked for a short distance, slender, and acute; 
pinne very numerous, slender. Colors quite variable, especially those 
of the branchie; the branchie are frequently purplish brown, trans- 
versely banded with flake-white, alternating with yellowish green, the 
pinne usually having the same color as the portion from which they 
arise; on the exterior of the branchie the purple bands are often divided 
by a narrow longitudinal line of whitish; operculum brownish green 
on the outer surface, purplish on the sides, with white longitudinal lines 
toward the margin, greenish white at base; pedicel purplish, banded 
with white; collar pale translucent greenish, veined with darker green; 
body deep greenish yellow, the dorsal surface light yellow. Many other 
styles of coloration occur, some of which are described on page 322. 
Length up to 75™; diameter about 3™™. 
Great Egg Harbor to New Haven and Cape Cod; low-water mark to 
8 fathoms. 
The tubes are long, variously crooked, and often contorted, sometimes 
solitary, frequently aggregated into masses four or five inchesin diame- 
ter. They are nearly cylindrical, with irregular lines of growth, and 
sometimes with faint carinations. 
SERPULA DIANTHUS, var. CITRINA Verrill. (p. 322.) 
I have applied this name to a very marked color-variety, in which the 
