A Review of the Genus Eunice - Smithsonian Institution Libraries

132 SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY
numbers of branchial setigers present and in the much darker
color of the subacicular hooks and aciculae. The latter makes it,
by definition, a member of group B-l rather than of group A-l.
It is listed with similar species in Tables 24 and 25. It is the only
species listed in Table 25 that has two or three subacicular
hooks in most segments and has the aciculae distally expanded
and tab-shaped at least in some setigers.
59. Eunice elseyi Baird, 1869
FIGURE 411-q; TABLES 46,47,52.53
Eunice elsyi Baird, 1869:344.
Eunice elseyi—Mclntosh, 1885:286-287, figs. 46, 47, pi. 39: figs. 1-3, pi.
20A: figs. 14-16.—Fauchald, 1986:249-250, figs. 35-40.
MATERIAL EXAMINED.—Two syntypes, BM(NH) ZH
1857.11.18.249, and in addition 2 mounted slides with
parapodia and 1 slide with the jaws. North Australia, coll. J.R.
Elsey, North Australia Exploring Expedition, 1855-56.
COMMENTS ON MATERIAL EXAMINED.—One syntype is in
two pieces; the anterior end has been deeply dissected and the
jaws removed. The other syntype consists of 48 anterior
setigers. Three short fragments in the vial do not belong to the
same species; they were briefly described by Fauchald (1986).
DESCRIPTION.—Syntype described complete, of unknown
sex, with 120 setigers; last 16 in regeneration; total length 64
mm; maximal width 7 mm; length through setiger 10, 13 mm.
Prostomium (Figure 41m) distinctly shorter than and
narrower than peristomium, less than x /i as deep as peristomium.
Prostomial lobes frontally rounded, dorsally inflated;
median sulcus deep. Antennae in shallow horseshoe, evenly
spaced, similar in thickness. Ceratophores ring-shaped in all
antennae, without articulations. Ceratostyles slender and
tapering, with up to 22 moniliform articulations in A-III. A-I to
posterior edge of anterior peristomial ring; A-I I to setiger 3;
A-III, when stretched, to setiger 5. Peristomium massive,
cylindrical. Separation between rings well marked ventrally
and less distinct dorsally; anterior ring 4 /s of total peristomial
length. Peristomial cirri to front edge of peristomium, slender
and tapering, with -10 articulations.
Maxillary formula 1+1, 5+7, 6+0, 5+10, and 1+1.
Branchiae (Figure 411) present, pectinate, distinctly longer
than notopodial cirri, not reduced in mid-body region, erect.
Branchiae from setiger 6 to setiger 104, missing in regenerating
portion. Branchiae present to near posterior end, present on
more than 65% of total number of setigers. All branchiae
strongly pectinate; most branchiae with at least 10 filaments,
maximum 18 filaments. Branchial stems erect, tapering, shorter
than notopodial cirri, decreasing in length posteriorly. Filaments
slender, digitiform, shorter than notopodial cirri.
Numbers of filaments remaining high even in last branchiated
segments.
Neuropodial acicular lobes symmetrically truncate; aciculae
emerging at midline. Pre- and postsetal lobes low, transverse
folds. First 5 ventral cirri digitiform. Median ventral cirri
basally inflated. Inflated bases ovate; narrow tips digitiform.
Ventral cirri slender and digitiform from the last branchiated
segments. Notopodial cirri (other than those in the regenerate)
long, basally somewhat inflated, with up to 9 articulations.
Most notopodial cirri reaching nearly midway across body.
Limbate setae slender. Shafts of pectinate setae (Figure 4In)
wide, cylindrical. Blades tapering, flat. One marginal tooth
longer than other teeth, with -10 teeth. Shafts of compound
falcigers inflated, marginally smooth. Appendages (Figure
41q) tapering, tridentate with small third teeth closely
appressed to second teeth. Proximal teeth triangular, directed
laterally. Second teeth larger than proximal teeth, directed
obliquely distally. Guards bluntly pointed, marginally smooth;
mucros absent. Pscudocompound falcigers and compound
spinigcrs absent. Aciculae (Figure 41p) yellow, bent dorsally,
shallowly bidentate in antcropostcrior axis; cross-section
round. Separation between core and sheath indistinct in both
aciculae and subacicular hooks. Subacicular hooks (Figure
41o) yellow, tridentate. Hooks first present from setiger 30,
present in all setigers thereafter, always single (except for
replacements). Primary fangs large; secondary fangs small;
tertiary fangs small, appended laterally to secondary fangs
rather than emerging dorsally.
UNKNOWN MORPHOLOGICAL FEATURES.—Relationship between
Mx III and left Mx IV; pygidium and anal cirri.
EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEA-
IURES.—Mx III long and located behind left Mx II.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 56, 58, 59. Unknown
Characters: 4,6,13,14,42.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—
None.
REMARKS.—The status of this species was explored in
Fauchald (1986); it is listed with similar species in Tables 46
and 47. It has bidentate or bifid aciculae and the subacicular
teeth are tridentate with the teeth in tandem; this combination is
unique in Table 47. It is compared to other species with the
teeth in tandem in Tables 52 and 53.
Eunice enteles (Chamberlin, 1918)
Leodice enteles Chamberlin, 1918:175-176.
Eunice enteles.—Hartman. 1938:97.
lEunice antennata.—Hartman, 1944:115-117, pi. 7: figs. 154-156 [in part,
not Eunice antennata Lamarck, 1818].
REMARKS.—No material is currently available of this
species at MCZ where Chamberlin indicated that his types were
deposited.
It was originally described with branchiae from setiger 6-7
to the end of the body with a maximum of five filaments and no
indication of an intermediate region with a reduced number of
filaments. All antennae had moniliform articulations. A-III
reached setiger 4 and A-I I reached setiger 3. The peristomial