A Review of the Genus Eunice - Smithsonian Institution Libraries

NUMBER 523 173
dorsally and especially ventrally; anterior ring 3 A of total
pcristomial length. Peristomial cirri to middle of prostomium,
tapering, slender, with 10 articulations.
Maxillary formula 1+1, 8+9, 9+0, 6+10, 1+1 according to
Hoagland (1920, pi. 50: fig. 10). Teeth very small and
indistinct. Mx III long, located behind left Mx II.
Branchiae (Figure 56d) present, pectinate, distinctly shorter
than notopodial cirri, not reduced in mid-body region, erect.
Branchiae from setiger 4 to setiger 102 (Figure 56i). Branchiae
present to near posterior end, on more than 65% of total number
of setigers. First and last 7 branchiae single filaments.
Maximum 7 filaments from setiger 10 through setiger 30. From
about setiger 35 through setiger 90, 3 filaments. Stems shorter
than filaments, tapering. Filaments short, digiliform.
Neuropodial acicular lobes symmetrically rounded; aciculae
emerging at midlinc. Pre-and postsetal lobes low, transverse
folds. First 4 ventral cirri thick, tapering, basally inflated from
about setiger 5. Inflated bases modest, ovate, reduced by setiger
50; narrow tips tapering. Posterior ventral cirri increasingly
long and slender, tapering, less than half as long as notopodial
cirri. Notopodial cirri long, basally somewhat inflated, with 6
articulations anteriorly, decreasing to 2 in far posterior setigers.
Articulations moniliform in anterior setigers, becoming cylindrical
in posteriormost setigers.
Limbate setae longer than all other setae, slender, marginally
serrated. Pectinate setae (Figure 56g) very small; shafts slender,
cylindrical. Blades flaring, flat. One marginal tooth distinctly
longer than other teeth, with 10 long, slender teeth. Shafts of
anterior and median compound falcigers (Figure 56c) inflated,
marginally serrated; distal beak absent. Anterior appendages
very narrow, tapering; head small, bidentate. Proximal teeth
reduced triangular, directed laterally. Distal teeth longer than
proximal teeth, directed obliquely laterally. Shafts of posterior
compound falcigers (Figure 560 inflated, but less so than in
median setigers, marginally serrated; distal beak present
Posterior appendages short, tapering; head distinct, bidentate.
Proximal teeth large, triangular, directed laterally. Distal teeth
smaller than proximal teeth, tapering, directed obliquely
distally. Guards of all compound hooks asymmetrically bluntly
pointed, marginally serrated in anterior and median hooks,
smooth in posterior hooks; mucros absent. Pseudocompound
falcigers and compound spinigers absent Aciculae (Figure
56h) paired, yellow; cross-sections round. Inferior aciculae
curved, bluntly pointed, about twice as thick as superior
aciculae. Superior aciculae straight, sharply pointed. Separation
between core and sheath indistinct in both aciculae and
subacicular hooks. Subacicular hooks (Figure 56b,e) yellow,
tridentate with teeth in a crest Hooks first present from setiger
22 or 25, present in all setigers thereafter, always single (except
for replacements). Proximal teeth large, directed laterally,
straight; two distal teeth erect, emerging from common shaft.
UNKNOWN
anal cirri.
MORPHOLOGICAL FEATURES.—Pygidium and
EXPECTED STATE OF SELECTED UNKNOWN FEATURES.—
None.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 56, 58, 59. Unknown
Characters: 13, 14.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—
None.
REMARKS.—The specific name articulata is preoccupied in
the combination Eunice articulata Ehlers, 1887, and must be
replaced.
Eunice hirschi is listed with similar species in Tables 46 and
48. Among the species in Table 48, E. hirschi, E. panamena,
and E. stigmatura lack a middle region with reduced branchiae;
such a region is present in some specimens of E. ornata, but is
missing in others. Among these species, E. panamena and E.
stigmatura have the three median antennae similar in length;
the other two species have A-III distinctly longer than A-II. In
E. ornata the branchiae are distinctly longer than the
notopodial cirri; in E. hirschi the branchiae are shorter than the
notopodial cirri.
The species is named for Dr. Leonard P. Hirsch for all his
support and encouragement during this study.
Eunice hispanica (Lamarck, 1818)
Leodice hispanica Lamarck. 1818:323.—Savigny, 1820:51.
Eunice hispanica.—Audouin and Milne Edwards. 1833:219; 1834:145.—
Gnibe, 1850:292.—Quatrefages. 1866:324.—Fauvel, 1923:451.
REMARKS.—This species was described as having smooth
antennae and chestnut-colored aciculae; anterior notopodial
cirri long; branchiae with up to three filaments present from
setiger 3; only 15 or 16 pairs of branchiae present; branchiae
shorter than notopodial cirri.
Audouin and Milne Edwards (1833:219) suggested that the
species was primarily characterized by the poor development of
the branchiae.
Grube (1850:292) listed the species as valid without
comment. Quatrefages (1866:324) found it to be incompletely
described. Fauvel (1923:451) listed it as incertae sedis without
comment.
No material is available; the precise origin of Lamarck's
material (other than presumably Spain) is unknown and the
available information is wholly inadequate to characterize the
species. The species is here considered indeterminable.
88. Eunice imogena (Monro, 1924)
FIGURE 56j-n; TABLES 33,40
Nicidion imogena Monro, 1924:61-62, figs. 22-24.
MATERIAL EXAMINED.—Holotype, BM(NH) ZK
1924.1.28.91, Hotspur Bank, off the coast of Brazil, 16°S,
36°W.
COMMENTS ON MATERIAL EXAMINED.—The holotype was
originally described as consisting of 108 setigers and being 25