Annelids of Marshall Islands — Reish 
circular. The prostomium also bears a pair of 
antennae and biarticulated palpi. Areas VI of 
the proboscis each bears a pair of conical papil- 
lae, and areas VII and VIII possess eight 
papillae in a single row. The other areas lack 
papillae. Three of the four pairs of peristomial 
tentacles are short, and the fourth pair is long. 
The first two setigerous segments are uniramous. 
Biramous parapodia begin with segment 3, with 
each ramus possessing a yellow to black acicu- 
lum. The parapodia of segments 14, 42, and 7 6 
are shown in Figure 4, 1-3. The notopodium 
bears only homogomph spinigers (Fig. 4, 4). 
The neuropodium has superior homogomph 
spinigers and heterogomph falcigers (Fig. 4, 3). 
The pygidium terminates with two filiform 
cirri. 
ecology: All eight specimens were collected 
from pieces of coral heads taken from shallow 
water at Bogen Island opposite the deep chan- 
nel entrance between Parry and Japtan islands. 
Along with C. corallicola, 20 other species of 
polychaetes were collected, the principle ones 
being Typosyllis brachychaeta, Eunice (AT). 
gracilis, Palola siciliensis, and Polyophthalmus 
p ictus. 
remarks: The genus Ceratocephala is known 
from eight species and subspecies (Hartman, 
1959, I960; Hartmann-Schroder, 1962). C. 
corallicola and C. edmondsi Hartman (1954£) 
from Australia may be separated from the other 
known species by the possession of a single 
ventral cirrus rather than a bifurcated one. C. 
corallicola differs from C. edmondsi by the 
absence of papillae on areas I to IV, and by the 
presence of two papillae rather than one on a 
side on area VI. 
type material: Holotype and six paratypes 
in the U.S. National Museum. 
Ceratonereis costae? (Grube) 
Fauvel, 1953, pp. 194-195, fig. 98 a-f; Hart- 
man, 1954a, p. 629. Specimens questionably re- 
ferred to this species were reported from an 
unspecified locality at Bikini Atoll by Hartman. 
Cosmosoplitan. 
Ceratonereis mirabilis Kinberg 
Fauvel, 1953, pp. 200-201, fig. 103 a-c; 
Hartman, 1954^, p. 629. eniwetok: Parry 
111 
(0,L), Eniwetok (L), Igurin (L), Rigili (O), 
Bogombogo (O), Engebi (O), Aaraanbiru 
(0,L) , Bogen (O), and also from Lidilbut 
(O) by Hartman. Cosmopolitan in the warmer 
seas. 
Ceratonereis pachychaeta Fauvel 
Fauvel, 1953, p. 196, fig. 99 a-h; Hartman, 
195 4a, p. 629. Hartman reported this species 
from Bikini Island at Bikini Atoll and from 
Rigoman and Rongelap Islands at Rongelap 
Atoll. Central Pacific Ocean to Gulf of Suez. 
Neanthes arenaceodentata (Moore) 
Nereis arenaceodentata Moore, 1903, pp. 
720-723, pk 40, figs. 1-10. 
Nereis cricognatha Ehlers. Fauvel, 1953, pp. 
180-181, fig. 91 a-c. 
Neanthes arenaceodentata. Hartman, 1959, p. 
250. 
Nereis ( Neanthes ) arenaceodonta[ sic]. Pet- 
tibone, 1963, pp. 162-165, figs. 44i, 45e; 
Hartmann-Schroder, 1965, p. 123. 
eniwetok: Parry (0,L). A total of 24 speci- 
mens were collected; all but 5 were taken from 
the sandy mud found at the bottom of the 
trough of the domestic outfall sewer. The other 
collection came from sand at a depth of 15 ft 
from the lagoon side of Parry Island. This is the 
first report of the species from the Marshall 
Islands. Cosmopolitan. 
Neanthes daivydovi (Fauvel) 
Nereis daivydovi Fauvel, 1937, p. 297-299, 
fig. 1 a-k. 
Neanthes daivydovi. Hartman, 1954^, p. 629. 
eniwetok: Parry (O), Engebi (O), Aaraan- 
biru (O); also from Lidilbut (O) and from 
Rongelap Atoll by Hartman. Central Pacific 
Ocean to Indo-China. 
Nereis zonata peruse a Fauvel 
Fauvel, 1953, pp. 187-188, fig. 95 f-h; Hart- 
man, 1954^, p. 629. eniwetok: Bogombogo 
(0,L). bikini: Enyu (O) . Indo-Pacific Ocean 
and Red Sea. 
Platy nereis poly sc alma Chamberlin 
Fauvel, 1953, pp. 221-222, fig. 112 a-e; 
Hartman 1954a, p. 629. eniwetok: Parry (L). 
Hartman reported this species from Rongelap 
Atoll. A total of 40 epitokes were collected from 
two localities on the lagoon side of Parry Island 
