A Review of the Genus Eunice - Smithsonian Institution Libraries

266 SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 22, 56. Unknown
Characters: 1, 2, 6, 36-38,40,47, 50, 57-60,63.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—37,1;
38,1.
REMARKS.—Eunice perimensis is listed with similar species
in Tables 33 and 39. Of species listed in Table 39, four have
more than three branchial filaments where the branchiae are
best developed; these include E. complanata, E.flavapunctata,
E. magnifica, and E. perimensis. The peristomial cirri reach
beyond the prostomium in E. complanata and do not outreach
the peristomium in E. flavapunctata and E. perimensis; the
length of the cirri is unknown for E. magnifica. The separation
between the two peristomial rings is distinct on all sides in E.
flavapunctata and is limited to the dorsal and ventral sides in E.
perimensis; the separation is unknown for E. magnifica.
Finally, the branchiae are held stiffly erect in E. magnifica and
are flexed in E. perimensis.
155. Eunice perrieri Gravier, 1900
FIGURE 88f-j; TABLES 33,37
Eunice perrieri Gravier, 1900:232-236, figs. 83-88. pi. 12: figs. 57-59.
MATERIAL EXAMINED.—Holotype, MNHN, Paris, Red Sea,
Djibouti, coll. Coutiere, no. 29, 1897.
DESCRIPTION.—Holotype complete with 185 setigers; total
length 135 mm; maximal width 5 mm; length through setiger
10, 12 mm. Body cylindrical throughout, with very modest
flattening of dorsum towards posterior end.
Prostomium (Figure 88f) distinctly shorter and narrower
than peristomium, as deep as 1 /2 of the peristomium. Prostomial
lobes frontally rounded, dorsally excavate with a thickened
rim; median sulcus deep. Eyes on lateral sides of ceratophores
of A-II. Antennae in a horseshoe, evenly spaced, similar in
thickness. Ceratophores long in all antennae, without articulations.
All ceratostyles tapering, without articulations. A-I to
posterior peristomial ring; A-II and A-III to setiger 1.
Peristomium tapering slightly anteriorly, but basically cylindrical.
Lower lip thick, inflated, distinctly set off from rest of
anterior ring. Separation between rings distinct dorsally and
ventrally; anterior ring - 3 A of total peristomial length.
Peristomial cirri to anterior third of anterior peristomial ring,
slender and digitiform, without articulations.
Maxillary formula 1+1,4+4, 6+0,4+8, and 1+1. Jaws small
in relation to size of specimen. Teeth on Mx IV small. Left Mx
IV part of distal arc with Mx III.
Branchiae (Figure 88j) present, pectinate, distinctly longer
than notopodial cirri, not reduced in mid-body region, erect.
Branchiae from setiger 18 to setiger 170, absent from last 15
setigers of body. Branchiae present to near posterior end,
present on more than 65% of total number of setigers. First 2-3
and last 4-5 pairs single filaments; maximum 10 slender
filaments where best developed, at about setiger 30. Branchial
stems slender.
Anterior neuropodial acicular lobes wide, rather flattened,
becoming about as high as wide in posterior end, retaining
smoothly rounded outlines; aciculae emerging at midline. All
presetal lobes low, transverse folds. Postsetal lobes about twice
as high as acicular lobes in first 20 setigers; distally rounded.
Postsetal lobes reduced to following outline of acicular lobes
by about setiger 30; posterior postsetal lobes low, transverse
folds. First 9 ventral cirri basally thick, abruptly tapering with
slender, pointed tips. Ventral cirri basally inflated from about
setiger 10 through about setiger 100. Inflated bases thick,
transverse welts; narrow tips tapering. Far posterior ventral cirri
slender, digitiform, increasing slightly in length, approximating
length of notopodial cirri. Notopodial cirri basally slightly
inflated in anterior 2 /3 of body, digitiform in last third of body.
All notopodial cirri without articulations.
Limbatc setae slender, marginally smooth. Shafts of pectinate
setae (Figure 88i) very slender, blades strongly furled and
flared. One marginal tooth very much longer than other teeth;
-20 teeth present. Shafts of compound falcigcrs (Figure 88g)
inflated, marginally serrated. Appendages small wilh nearly
parallel sides; heads large, distinct, bidentatc. Proximal teeth
slightly larger than distal teeth, tapering, directed laterally or
slightly basally. Distal teeth tapering, directed obliquely
laterally. Gap between teeth somewhat variable. Guards
symmetrically rounded, marginally serrated; mucros absent.
Pseudocompound falcigers and compound spinigcrs absent.
Aciculae usually single, wilh dark copper-colored to dark
brown cores and clear sheaths, tapering, distally gently curved;
cross-section round. Subacicular hooks (Figure 88h) with dark
copper-colored cores and clear sheaths, bidentate. Hooks first
present from setiger 25, present in all setigers thereafter, always
single (except for replacements). Hook distally strongly
tapering; heads indistinct. Teeth similar in size, short,
indistinct, directed distally.
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: 22, 56, 58, 59. Unknown
Characters: 4,6.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—
None.
REMARKS.—Eunice perrieri resembles E. afra closely and
has been considered a synonym of that species. A non-type
specimen in the collections of MNHN, Paris, from Djibouti,
labeled in Fauvel's handwriting, was identified as "£. afra (= E.
perrieri)."
Eunice perrieri is listed with similar species in Tables 33 and
37. It is the only species in Table 37 with as many as 10
branchial filaments. It has long ceratophores in all antennae,
feature it shares with only one species in Table 37, E. aciculata.