Annelids of Marshall Islands — Reish 
225 
5. Thoracic uncini pectinate Loimia medusa 
5. Thoracic uncini avicular 
Eupolymnia tri go stoma 
Eupolymnia tri go stoma (Schmarda) 
Polymnia nehulosa (Montagu). Fauvel, 1953, 
pp. 419-420, figs. 419 a-g (in part). 
Eupolymnia trigostoma. Hartman, 1954^ p. 
629. 
eniwetok: Bogombogo (0,L). Reported 
from Bikini Atoll by Hartman. Indo-Pacific 
Ocean. 
Leaena minuta Hartman 
Hartman, 1954^, p. 639, figs. 178 E, H. This 
species was described from seven species col- 
lected from coral heads on the seaward side 
of Parry Island, Eniwetok Atoll. It has not been 
collected since. 
Loimia medusa (Savigny) 
Fauvel, 1953, pp. 416-418, figs. 218 a-f; 
Hartman, 1954^, p. 629; Hartmann-Schroder, 
1965, p. 155. bikini: Bikini (L), and ronge- 
lap: Rongelap; both reported by Hartman. 
Cosmopolitan, especially in the warmer seas. 
Poly cirrus sp. cf. P. medius Hessle 
Hartman, 1954^, pp. 639-641. One specimen 
was reported from Enirik Island, Bikini Atoll 
by Hartman; it comes close to P. medius but 
differs in the nature of the ventral gland shield. 
Terebella ehrenhergi Grube 
Terebella ehrenbergi Grube. Fauvel, 1953, 
pp. 421-422, figs. 220 a-c. 
Terebella ehrenbergi ? Grube [sic]. Hartman, 
1954^, p. 629. 
eniwetok: Parry (L), Igurini (O), Ani- 
yaanii (L), and reported from Lidilbut (L) by 
Hartman, bikini: Enyu (O) . Indo-Pacific 
Ocean and Red Sea. 
Thelepus sp. 
One small specimen, agreeing with the 
generic diagnosis, was taken from an old coral 
head in 5 ft of water on the lagoon side of 
Parry Island, Eniwetok Atoll. It was in a poor 
state of preservation, so that a specific deter- 
mination could not be made. 
Family sabellidae 
KEY TO THE SPECIES FROM MARSHALL ISLANDS 
1. Thoracic neuropodia with avicular uncini 2 
1. Thoracic neuropodia with long-handled 
crotchets 3 
2. Branchiae borne on short stalk; pigmented 
patches arranged laterally throughout length 
Sab ell a no tat a 
2. Branchiae borne on long stalk; body not 
pigmented Hypsicomus phaeotaenia 
3. Thoracic with 8 setigerous segments; ab- 
domen with 3 setigerous segments 
Fabricia bikini 
3. Thoracic with 8 setigerous segments; ab- 
domen with 13 or 14 setigerous segments, 
with the 6 posterior ones forming an anal 
depression Euchone eniwetokensis 
Genus Euchone Malmgren 
Euchone eniwetokensis, n. sp. 
Fig. 4 (6-9) 
Two specimens were collected from 90 ft of 
water in the lagoon near Parry Island by Mike 
Chamberlain on September 14, 1957. These 
minute specimens measured 2.5 mm and 2.0 
mm, including the branchial crown. Both speci- 
mens had 8 thoracic segments; one had 13, the 
other, 14 abdominal segments including the 6 
segments comprising the anal depression. 
The branchial crown is pinnate and the 
radioles are united with a membrane for one- 
third their length. Radioles number 3 and 4 
on a side in one specimen and 3 each on the 
other. 
The thoracic setae are simple capillary and 
subspatulate with a mucron in the notopodium 
(Fig. 4, 6), and number about 3-4 per seg- 
ment each. Long-handled uncini (Fig. 4, 7) are 
present in the neuropodium and number about 
5 per segment. 
Abdominal notopodial setae are avicular 
hooks (Fig. 5,8) and number about 30 per seg- 
ment. Only simple capillary setae (Fig. 5, 9) 
are present in the neuropodium. The setae of the 
anal depresison are the same as those in the 
more anterior abdominal segments. 
ecological notes: The tube is unknown. 
These specimens were collected from 90 ft of 
