Poly dor a from Eniwetok, Majuro, and Bikini — Woodwick 
147 
Eniwetok Atoll 
i I 
Fig. 1. Eniwetok Atoll, Marshall Islands. Distribution of the species on the various islands is discussed 
under their respective ecological considerations. 
DESCRIPTION AND SYSTEMATICS 
Poly dor a armata Langerhans 1880 
Fig- 2(1-6) 
This species was found at nine stations and 
was represented at both Eniwetok and Bikini 
atolls. The specimens had the characteristic 
spines of the fifth and the diagnostic specialized 
posterior notopodial setae. A 27-segment speci- 
men measuring about 2.5 mm had small bran- 
chiae on Segment 7 and well-developed bran- 
chiae on Segments 8-12. On all specimens it was 
difficult to distinguish the branchiae from the 
dorsal post-setal lobes. Hartman (1954) noted 
