Annelids of Marshall Islands — Reish 
221 
Family orbiniidae 
Mainer is sp. 
Hartman, 1954^, p. 637. One small specimen 
agreeing with the description given by Hartman 
was taken from the ocean side of Bogon Island 
at Eniwetok Atoll. Hartman reported it from 
the ocean side of Bogon and Parry islands. 
Family spionidae 
KEY TO THE SPECIES FROM MARSHALL ISLANDS 
1. Fifth setigerous segment modified . . 2 
1. Fifth setigerous segment not modified 8 
2. Branchiae begin anterior to the fifth setig- 
erous segment; neuropodial hooded hooks 
begin on setigerous segment 9 
Tripolydora spinosa 
2. Branchiae begin posterior to fifth setiger- 
ous segment 3 
3. Neuropodial hooks begin on setigerous seg- 
ment 7 Polydora 4 
3. Neuropodial hooks begin on setigerous seg- 
ment 8 Pseudopolydora 5 
4. Branchiae present on segments 7-12; pos- 
terior notopodial spines arranged in a cone 
Polydora armata 
4. Branchiae present on segments 10-26; pos- 
terior notopodium with only capillary se- 
tae Polydora tridenticulata 
5. Bifurcated prostomium; nuchal tentacles 
present or absent 6 
5. Prostomium entire; nuchal tentacles absent; 
special setae of fifth segment falcate hooks 
and limbate capillaries 
Pseudopolydora pigmentata 
6. Prostomium without nuchal tentacles and 
eyes; special setae of fifth segment expand- 
ed distally with a hairy top and falcate 
hooks Pseudopolydora reishi 
6. Prostomium with nuchal tentacles and 
eyes ............................ 7 
7. Special setae of fifth segment expanded 
distally and with a concavity; hooded hooks 
bidentate .... Pseudopolydora antennata 
7. Special setae of fifth segment of a lighter 
spoon-shaped type and a heavier, angled, 
distal type; hooded hooks bidentate with 
fenestrations at the ends of the teeth 
Pseudopolydora cor alii cola 
8. Prostomium with distinct frontal horns; 
branchiae on all but posterior segments 
Malacoceros ( Malacoceros ) mdicus 
8. Prostomium pointed or rounded anteri- 
orly 9 
9. Branchiae limited to few anterior seg- 
ments Prionospio cirrifera 
9. Branchiae present on nearly all seg- 
ments 10 
10. Bidentate hooded hooks present in noto- 
podium and neuropodium 
Scolelepis ( Scolelepis ) bonnier i 
10. Entire hooded hooks present only in neuro- 
podium Spio filicornis 
Malacoceros ( Malacoceros ) indicus (Fauvel) 
Scolelepis indica Fauvel, 1953, pp. 313-314, 
figs. 165 g-m. 
Malacoceros ( Malacoceros ) indicus (Fauvel). 
Pettibone, 1963, p. 99; Hartmann-Schro- 
der, 1965, p. 143, fig. 69. 
eniwetok: Parry (L). This is the first re- 
port of the species from the Marshall Islands. 
Tropical Pacific, Indian Ocean, South Africa. 
Polydora armata Langerhans 
Woodwick, 1964, pp. 147-148, figs. 2 
(1-6). eniwetok: Eniwetok (0,L), Rigili, 
Engebi, Aaraanbiru, Aniyaanii, and Japtan. bi- 
kini: Enyu. These specimens were identified 
and reported by Woodwick (1964). Cosmopoli- 
tan. 
Polydora tridenticulata Woodwick 
Woodwick, 1964, pp. 153-155, figs. 4 (1- 
5). eniwetok: Rigili (L), Engebi (L), and 
Japtan (0,L). These specimens were identified 
and reported by Woodwick (1964). This spe- 
cies is known only from Eniwetok Atoll. 
Prionospio cirrifera Wiren 
Fauvel, 1953, p. 324, figs. 164 k-m. eniwe- 
tok: Parry (L), Bogombogo (O), and Aaraan- 
biru (O). Cosmopolitan. 
Pseudopolydora antennata (Claparede) 
Woodwick, 1964, pp. 148-151, fig. 2 (7-8); 
Imajima and Hartman, 1964, pp. 286-287. 
Polydora ( Carazzia ) antennata Claparede. 
Fauvel, 1953, pp. 316-7, figs. 166 i-m. 
