284 EKUCHONE RUBROCINCTA. 
tips of the corresponding series in such as Huchone papillosa. The third series has narrower 
wings than the last, and the tips project little beyond the surface. So brittle are the tips 
that the tapered axis or terminal region of the shaft often snaps at the base of the wing, 
leaving a transparent web (forming the wings) projecting freely beyond it and on one side 
of the shaft. 
In his account of the species, Malmgren (1865) did not refer to other than the anterior 
hooks (Plate CXXXI, fig. 2a), which are rather large, have moderately long and boldly 
curved shafts, also as brittle as the bristles. These dilate from the base up to the shoulder, 
then are slightly narrowed at the neck. The main fang comes off nearly at a right angle, 
and in lateral view has eight or nine teeth above it, but the crown is flat, and thus differs 
from such as #. papillosa, in which the crown is more elevated. The hooks in the anterior 
part of the posterior region are avicular, have a main fang which leaves the neck at less than 
a right angle, a rather high crown with five or six teeth in lateral view, a convex posterior 
border, a prominent and massive prow, and a small basal process posteriorly. The terminal 
hooks (Plate CX XXVIII, figs. 9 and 9a) again are considerably smaller, have a much higher 
crown and more numerous teeth in lateral view above it, and the posterior basal process is 
smaller. All the shafts of the bristles and long hooks are slightly brownish by transmitted 
light. 
Southern (1914) observes: ‘‘ The short capillary setee at the base of the spatulate sete, 
which might be called the basal setee, for convenience, have the characteristic ““ bayonet ’’- 
bend of the shaft, and are distinctly winged. These basal setee form a useful specific character 
in many species of Sabellidee, but have only been figured in a few cases. The naked tips 
of the branchi are filiform. The usual row of glands encircles the body behind the setz 
of the second setigerous segment. There are thirty-one to thirty-two setigerous segments, 
of which nine to eleven form the anal funnel.” 
Reproduction.—Mature specimens were found by Southern between March and November. 
2. HUCHONE RUBROCINCTA, VAR. NormANI, McIntosh, 1916. Plate CXX, fig. 15—scapha ; 
Plate CXXXI, figs. 6—6d—bristles and hooks. 
Distinctive Characters.—Cephalic collar fairly developed, fissured dorsally, and sloping 
downward and forward to the mid-ventral region, where a slight projection occurs on each 
side with a fissure between. Body short; anal funnel wide but short antero-posteriorly, 
margin thin and deep, anteriorly with a shallow median notch, sides boldly crenate for fully 
the anterior half. Anterior bristles of two kinds, the dorsal with finely tapered tips and 
narrow wings, and the ventral with shorter tips and broader wings. Anterior hooks have 
strong, curved shafts tapering to the base, neck narrowed above the shoulder, main fang 
at a right angle and four teeth im lateral view above it. Posterior hooks avicular, with an 
inflection below the crown in the posterior outline and a short basal process posteriorly. 
Anterior outline begins below the main fang at less than a right angle and the prow is 
prominent whilst the base is abbreviated. 
SYNONYM. 
1916. Huchone Normani, McIntosh. Ann. Nat. Hist., ser. 8, vol. xvi, p. 34. 
