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PACIFIC SCIENCE, Vol. XXII, April 1968 
from Namu (L). majuro: Uliga (O). This is 
one of the most commonly encountered poly- 
chaetes in the Marshall Islands. Cosmopolitan. 
Family capitejllidae 
KEY TO THE SPECIES FROM MARSHALL ISLANDS 
1. Posterior end terminates in anal plate 
Heteromastides bifidus 
1. Posterior end rounded 2 
2. Capillary setae begin at first segment pos- 
terior to prostomium; specialized genital 
setae in segments 8 and 9 of male 
Capitella cap it at a 
2. Capillary setae begin at second segment pos- 
terior to prostomium; no specialized genital 
setae 3 
3. Hooks begin at setigerous segment 13; no 
branchiae Leiochrides? biceps 
3. Hooks begin at setigerous segment 14; 
branchiae present ..... Dasybranchus 4 
4. Anterior abdominal notopodia widely sep- 
arated from one another 
Dasybranchus caducus 
4. Anterior abdominal notopodia close to one 
another ..... Dasybranchus lumbricoides 
Capitella capitata (Fabricius) 
Hartman, 1947, pp. 404-405, pi. 43, figs. 
1-2; Imajima and Hartman, 1964, pp. 311-12, 
pi. 37, figs. a-g. eniwetok: Parry (L) and 
Engebi (L). Only three specimens of this spe- 
cies were taken, two from a sediment bottle 
collector (Reish, 196lb) suspended for 28 days 
at one of the boat docks on the lagoon side of 
Parry Island. This is the first report of the spe- 
cies from the Marshall Islands. Cosmopolitan. 
Dasybranchus caducus (Grube) 
Fauvel, 1953, pp. 365-366, figs. 187 l-o; 
Hartman, 1954*, p. 625 ; Imajima and Hartman, 
1964, pp. 312-313. eniwetok: Parry (O), 
Igurini (L), Rigili (L), Bogombogo (O), En- 
gebi (O), Aaraanbiru (O), and Bogen (O). 
bikini: Bikini and Enirik Islands by Hartman. 
majuro: Uliga (O). Cosmopolitan. 
Dasybranchus lumbricoides Grube 
Hartman, 1947, pp. 431-432, pi. 56, figs. 3- 
4; 1954*, p. 626. eniwetok: Lidilbut (O). 
Bikini Atoll by Hartman. Widespread through- 
out Indo-Pacific Ocean. 
Leiochrides? biceps Hartman 
Hartman, 1954*, pp. 638-639, figs. 177 a-c. 
This species is known from only one incomplete 
specimen from Rigonman Island, Rongelap 
Atoll. 
Heteromastides bifidus Augener 
Fauvel, 1953, p. 368, figs. 192 a-b. eniwe- 
tok: Parry (0,L), Eniwetok (O), Igurini (L), 
Rigili (L), Bogombogo (O), Engebi (O), 
and Bogen (O) . majuro: Uliga (O) . The dis- 
tribution is herein extended into the central 
Pacific Ocean from Australia and India. 
Family arenicolidae 
Branchiomaldane vincenti Langerhans 
Hartman, 1954*, p. 626. 
PBranchiomaldane vincenti. Hartmann-Schro- 
der, 1965, p. 154. 
Reported from the ocean side of Japtan, Eni- 
wetok Atoll by Hartman. Atlantic and Pacific 
oceans. 
Family maldanidae 
Axiothella australis Augener 
Fauvel, 1953, pp. 381-382, figs. 197 f-g. 
eniwetok: Parry (L), Rigili (O), Bogombogo 
(O), Aaraanbiru (O), and Bogen (O). bikini: 
Enyu (O). majuro: Uliga (O). The distribu- 
tion is herein extended from Australia and India 
to the Marshall Islands. 
Family terebellidae 
key to the species from marshall islands 
1. Branchiae absent ..... Poly cirrus medius 
1. Branchiae present ................. 2 
2. Uncini set in single rows throughout thoracic 
region ................. Thelepus sp. 
2. Uncini set in double rows in at least part 
of thoracic region ................. 3 
3. Thoracic notosetae serrated at tip 
Terebella ehrenbergi 
3. Thoracic notosetae with smooth edges 4 
4. Branchiae filiform ...... Leaena minuta 
4. Branchiae arborescent .............. 5 
