A Review of the Genus Eunice - Smithsonian Institution Libraries

116 SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY
dorsal fascicles numerically dominated by very long, slender
pectinate setae. Pectinate setae (Figure 35g) tapering, furled.
Both marginal teeth longer than other teeth; -15 teeth present.
Shafts of compound falcigers (Figure 35f,h) distinctly inflated,
marginally strongly serrated. Appendages of superior hooks
(Figure 35h) in anterior setigers, apparently nearly unidentate
in that both teeth, but especially proximal teeth reduced and the
distal teeth nearly erect. Inferior hooks (Figure 35d) in same
fascicle distinctly bidentate with small teeth; appendages
narrower and somewhat longer than in posterior setigers. In
posterior setigers all appendages (Figure 35f) similar, each
appendage with both teeth well developed; proximal teeth very
large. Guards distally symmetrically rounded, marginally
strongly serrated in all hooks; mucros absent. Pseudocompound
falcigers and compound spinigers absent. Aciculae
(Figure 35i) single, black, distally bent dorsally, with slightly,
but distinctly knobbed appearance, nearly bidentate in some
setigers; cross-section round. First few subacicular hooks
increasingly darker brown, from about setigcr 30 hooks black,
bidentate. Hooks first present from setigcr 22, present in all
setigers thereafter, always single (except for replacements).
Hooks (Figure 35e) with distinct curved heads with very large,
parrot-beaked main fangs and much smaller, curved distal
teeth. Guards distally rounded.
UNKNOWN MORPHOLOGICAL FEATURES.—Pygidium and
anal cirri.
EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEA-
TURES.—None.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 34, 56, 58, 59. Unknown
Characters: 39, 40, 74, 78.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—
None.
REMARKS.—Eunice conglomerans is listed with similar
species in Tables 33 and 36. Two species in Table 36 have
knobbed aciculae; all other species have tapering, more or less
pointed acicula. In addition to E. conglomerans, E. cirrobranchiata
has such aciculae. In E. conglomerans the bases of the
ventral cirri are inflated only in median setigers; in E.
cirrobranchiata the bases are inflated also through the posterior
setigers.
48. Eunice contingens (Chamberlin, 1919)
FIGURE 35j-r; TABLES 27,28
Leodice contingens Chamberlin, 1919a:260-263, pi. 57: figs. 1-5.
MATERIAL EXAMINED.—Holotype, USNM 19394, Albatross,
sta 3642, Galapagos Islands, near Hood Island, Ripple
Point, l°30'5"S, 89°35'W, 549 m, 7 Nov 1904, broken shells
and Globigerina.
COMMENTS ON MATERIAL EXAMINED.—The type is a
complete mature female with large eggs in the body cavity. It
has been dried out and no meaningful measurements can be
made. It appears to agree with Chamberlin's description.
DESCRIPTION.—Anterior end described, but not illustrated
by Chamberlin. Ceratophorcs ring-shaped in all antennae.
Ceratostyles without articulations, or vaguely wrinkled. A-I to
sctiger 1; A-I I to setigcr 4; A-I 11 to sctiger 6. Peristomium
cylindrical; separation between rings distinct at least vcntrally.
Pcristomial cirri long and slender, reaching well beyond frontal
margin of peristomium, without articulations. Maxillary formula
according to Chamberlin (1919a:263; see also pi. 57: fig.
1) 1+1,6+7,7+0,4+9, 1+1.
Branchiae (Figure 35k-l) present, pectinate, shorter than
notopodial cirri, not reduced in mid-body region, erect.
Branchiae from sctigcr 6 to end of specimen. Branchiae present
to near posterior end, present on more than 65% of total number
of setigers. First branchia single filaments; all others, except
possibly far posterior ones, pectinate; 18-19 filaments present
at or near sctigcr 15.
Ncuropodial acicular lobes (Figure 35j—1 > distally rounded
or truncate; aciculae emerging at midlinc. All pre- and postsctal
lobes low folds. Anterior ventral cirri tapering from wide,
triangular bases. Median ventral cirri basally inflated; inflated
bases transverse welts; narrow tips digiliform. Posterior ventral
cirri digiliform, without basal inflations. Anterior notopodial
cirri long and slender, basally somewhat inflated; median
notopodial cirri somewhat shorter; the basal inflated region
more distinct. Far posterior notopodial cirri slender and shorter
than in anterior end. Notopodial cirri without articulations
Anterior pectinate setae (Figure 35m) furled, tapering, with
1 marginal tooth longer than other teeth; -10 teeth present.
Median and posterior pectinate setae (Figure 35o,p) flaring,
furled; -15 teeth present. Shafts of compound falcigers (Figure
35n/) distinctly to slightly flaring; anterior shafts slightly
serrated; beaks present. Appendages short with both teeth well
developed and directed laterally, bidentate. Proximal teeth
tapering, tilted distally. Guards asymmetrically bluntly pointed
in anterior setigers, symmetrically bluntly pointed in posterior
setigers; mucros absent. Pseudocompound falcigers and compound
spinigers absent. Aciculae paired, black, straight and
tapering; inferior one somewhat heavier than superior one;
cross-sections round. Subacicular hooks black, bidentate; first
present from setiger 30. Hooks (Figure 35q) tapering evenly
from the middle; head indistinct; both teeth directed distally.
UNKNOWN MORPHOLOGICAL FEATURES.—Structure of
prostomium; relationship between Mx III and left Mx IV;
pygidium and anal cirri.
EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEA-
TURES.—Mx III short, forming part of distal arc with left Mx
IV.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 22, 56, 58, 59. Unknown
Characters: 1-17, 19, 20, 23, 25, 26, 28, 36, 40, 51,
54,65-68,74,78,81,82.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—
None.