A Review of the Genus Eunice - Smithsonian Institution Libraries

182 SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY
with 3 or 4 indistinct articulations.
Maxillary formula 1+1, 8+9, 8+0, 7+11, and 1+1; maxillae
slender and teeth even in size in each maxilla.
Branchiae present, pectinate, distinctly longer than notopodial
cirri, not reduced in mid-body region, erect. Branchiae
from setiger 4 to 46, terminating well before posterior end,
present on less than 55% of total number of setigers. First 2 and
last 2 or 3 pairs single filaments. All other branchiae pectinate
with up to 11 filaments. Stems slender, erect. Filaments
slender.
Anterior neuropodial acicular lobes distally truncate; median
acicular lobes increasingly triangular; posterior acicular lobes
bluntly pointed; aciculae emerging at midline. Pre- and
postsetal lobes low, transverse folds. First 3 ventral cirri thick,
tapering. Inflated bases never very distinct, ovate; narrow tips
large and tapering. Postbranchial ventral cirri gradually
becoming tapering and finally digitiform. Notopodial cirri
prominent in anterior setigers, becoming shorter in far posterior
setigers. Anterior notopodial cirri basally somewhat inflated,
with 2 or 3 articulations. Postbranchial notopodial cirri less
distinctly basally inflated. Articulations missing from early
branchial setigers.
Most setae broken. Shafts of compound falcigers (Figure
59c) inflated, marginally smooth. Appendages narrow, slightly
tapering; heads indistinct, bidentate. Proximal teeth shorter
than distal teeth, forming a wide-based, low triangular
projection. Distal teeth tapering, narrow, nearly erect Guards
symmetrically bluntly pointed; mucros absent. Pseudocompound
falcigers and compound spinigers absent. Up to 3
aciculae (Figure 59b) present, yellow, pointed, very nearly
straight or very gently curved ventrally; cross-sections round.
Separation between core and sheath indistinct in both aciculae
and subacicular hooks. Subacicular hooks (Figure 59a,d)
yellow, bidentate. Hooks first present from setiger 34, present
in all setigers thereafter, paired in some setigers. Hooks
tapering; heads large. Proximal teeth very much larger than
distal teeth, triangular, directed slightly basally. Distal teeth
triangular, erect. Secondary subacicular hooks (Figure 59d),
when present, resembling primary hooks, except proximal teeth
strongly parrot-beaked.
UNKNOWN MORPHOLOGICAL FEATURES.—Relationship between
Mx III and left Mx IV; structure of pectinate setae.
EXPECTED STATES OF SELECTED UNKNOWN FEATURES.—
None.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 56, 58, 59. Unknown
Characters: 4, 6,42,65-68.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—
None.
REMARKS.—The original name, E. gracilis, is preoccupied
in the combination E. gracilis Grube, 1866. The new name
refers to the country of origin of the type material.
Eunice japonica was considered a synonym of E. longicirrata
Webster (Imajima and Hartman, 1964:256; see E.
websteri). It belongs to group A-l and is listed with similar taxa
in Tables 19 and 20. It can be separated from E. websteri and
similar species by having branchiae from setiger 4 rather than
from setiger 3. It is very similar to E. kobiensis, but in the
former the proximal teeth of the subacicular hooks are directed
laterally; both teeth are directed distally in £. kobiensis. Eunice
kobiensis can be separated from E. websteri as indicated below.
Eunice jeffreysii Mclntosh, 1903
Eunice Jeffreys UMclnlosh, 1903:137-140, fig. 1. pi. 11: figs. 15-20.
REMARKS.—Examination of the type material demonstrates
that this species belongs to the genus Euniphysa; a review of
that genus is in preparation.
95. Eunice johnsoni Hartman, 1954
FIGURE 59f-j; TABU* 22,23
Eunice johnsoni Uanman. 1954:633-634. fig. 175a-c,e,f.
MATERIAL EXAMINED.—Holotypc, USNM 24717, Bikini
Atoll, Marshall Islands, Operation CROSSROADS, 1946, coll.
M. W. Johnson.
DESCRIPTION.—Holotype complete, of unknown sex, with
160 setigers; total length 75 mm; maximal width 3 mm; length
through setiger 10, 7 mm. Anterior body cylindrical, farther
posteriorly dorsally flattened, flat and broad, Marphysa-Mkc,
with crowded segments.
Prostomium (Figure 590 distinctly shorter and narrower
than peristomium, less than l /2 as deep as peristomium.
Prostomial lobes frontally rounded, dorsally inflated; median
sulcus deep. Eyes between bases of A-I and A-II. Antennae in
shallow horseshoe, evenly spaced, similar in thickness.
Ceratophores ring-shaped in all antennae, without articulations.
Ceratostyles distally club-shaped, with up to 12 poorly marked,
cylindrical articulations in A-I 11. A-I to posterior peristomial
ring; A-II to setiger 3; A-II I to setiger 4. Peristomium
cylindrical. Separation between rings distinct on all sides, but
best marked dorsally and ventrally; anterior ring 3 A* of total
peristomial length. Peristomial cirri to middle of anterior
peristomial ring, slender and digitiform, without articulations.
Maxillary formula 1+1,4+5, 7+0, 4+8, and 1+1.
Branchiae (Figure 59j) present, pectinate, distinctly longer
than notopodial cirri, not reduced in mid-body region, erect.
Branchiae from setiger 24 to 130. Branchiae terminating well
before posterior end, present more than 65% of total number of
setigers. First 3 and last 20 pairs single filaments. Other
branchiae with up to 10 primary filaments. Stems cylindrical,
about as long as notopodial cirri. Filaments thick, often
somewhat folded, some branching distally with short terminal
filaments, longer filaments as long as notopodial cirri.
Anterior neuropodial acicular lobes truncate; median acicular
lobes rounded; posterior acicular lobes increasingly triangular,
aciculae emerging at midline. Pre- and postsetal lobes low,