274 DASYCHONE ARGUS. 
(about eighteen) of clavate processes are attached in pairs, and a pigment-spot occurs at 
each side just beyond the attachment. The colour of the branchiz varies from pale green 
to dull orange with a tint of green, or dull purplish-red spotted with white, and several 
of the clavate processes are also white. Others have brownish-purple branchize. Body 
moderately elongated (1—2 inches), and having fifty-eight to sixty-six segments, 
rounded dorsally and devoid of an anterior groove, slightly flattened ventrally, and 
with a median groove from the posterior border of the ninth segment to the terminal 
anus, which has a papilla on each side. Colour madder brown or dull red with white 
specks dorsally and ventrally, or dull orange with only a few whitish grains on the 
collar; or light orange, the lobes of the collar being speckled with minute dots of white ; 
two white papille occur at the anus, and a white patch in front of it. A bold dark brown 
speck is situated at the ventral edge of each setigerous process in the anterior region, the 
unc nigerous ridge commencing behind it. In the second region the speck is placed rather 
behind the setigerous process and at the commencement of the uncinigerous row. Typical 
anterior bristles in two series, an upper with short, tapering, winged tips and more elongated 
striated shafts, which slightly taper toward the wings and again toward the insertion. Those 
next have somewhat broader wings which are striated, and serrated at the edges. Posterior 
bristles in small tufts, the upper with much elongated tips and indistinct wings, whilst the 
lower have distinct and wider wings, though the tips are attenuate. Anterior hooks (which 
commence on the second bristled segment) avicular’ with the posterior outline convex and 
the anterior concave, the main fang leaving the throat at a little less than a right angle, 
and a series of small teeth occur on the crown above it. Prow convex, and the basal process 
strap-like and usually bent downward posteriorly. The posterior hooks are slightly smaller 
but their outline differs little. Tube composed of tough secretion more or less coated with 
mud, and sometimes fragments of shells are used for strengthening it. 
SYNONYMS. 
1774. Penicillus, Pmceau. Guettard. Mém. Différ. Phys. Hist. Nat., etc., t. i, p. 59, pl. lxix, fig. 3. 
1803. A Sabella resembling the Penicillus, Montagu. ‘Test. Brit., p. 544. 
1829. Sabella lucullana, Delle Chiaje. Memorie, vol. in, p. 218, Tay. xlu, fig. 23. 
1835. »  ventilabrum, Sars. Beskr. og. Iagtt., p. 47. 
1843 ?. Clymeneis stugmosa, H. Rathke. Nova Acta Acad. C. L. C., xx, p. 226, Tab. ix, figs. LO—14. 
1843-53. Amphitrite lucullana, Chenu. Illust. Conch., 11° livr., pl. vu, fig. 2. 
1845. Sabella carnea, Johnston. Ann. Nat. Hist., xvi, p. 449. ; 
1846. Dasychone (Sabella) lucullana, Grube. Arch. f. Naturges., p. 46, Tab. 11, fig. 3. 
1851. Sabella lucullana, Sars. Reise 1. Lofot. og. Finm., p. 82. 
* Pe 5 idem. Nyt Mag., Bd. vi, p. 202. 
1853. Amphitrite bombyx, Dalyell. Pow. Creat., 11, p. 236, pl. xxxi, figs. 1—7, pl. xxxu, figs. 1—13, 
and pl. xxxii. 
»  NSabella Lucullanna, Sars. Nyt Mag., Bd. vii, p. 390. 
1856. Sabella pumila and infarcta, Kréyer. Overs. Kgl. danske Vid.-Selsk. Forhandl. Kjébenhavn, 
p. 121. . 
1858. Branchiomma Dalyelli, Kolliker. Zeitschr. f. wiss. Zool., ix, p. 536. 
1861. Dasychone argus, Sars. Forhand. Vidensk.-Selsk. Christ., p. 125. 
1863. 9 » ldem. Nyt Mag., t. xu, p. 319. 
