Annelids of Marshall Islands — Reish 
229 
ecological notes: The majority of the 
specimens were collected from the ocean side 
of the islands. The tubes were attached to either 
corals or coralline algae. Hartman reported 
Serpula sp. from the ocean side of Lidilbut and 
Japtan Islands at Eniwetok Atoll. 
remarks: The genus is known from about 
16 recent species (Hartman, 1959; Pillae, 
I960). S. hartmanae can be readily separated 
from the majority of the known species in the 
genus by the small number of crenulations to 
its operculum. Three additional species are 
known to possess a small number of opercular 
crenulations: S. watsoni Willey (1905) with 
25, S. lo-hiancoi Rioja (1917) with 18-20, and 
S. concharium Langerhans (1880) with 18- 
22 crenulations. S. hartmanae can be separated 
from S. watsoni on the basis of the long opercu- 
lar funnel in the latter species; it can be sepa- 
rated from S. lo-biancoi by the asymmetrical 
operculum and the greater number of teeth and 
shape of the thoracic uncini in the latter species; 
it can be separated from 5*. concharjum by the 
absence of a constriction at the base of the 
opercular funnel, by the fewer number of teeth 
and shape of the thoracic uncini, and by the 
presence of a dorsal ridge in the tube in the 
latter species. 
type material: The holotype, one paratype, 
and additional material have been deposited in 
the collections of the U.S. National Museum. 
Spirohranchus giganteus (Pallas) 
Fauvel, 1953, pp. 462-463, figs. 252 a-g; 
Hartman, 1954^, p. 629. eniwetok: Parry 
(L), Engebi (O), Aaraanbiru (O), and by 
Hartman from Lidilbut (O). Only five speci- 
mens were collected by the author and all but 
one were attached to corals. Cosmopolitan in 
tropical seas, especially on coral reefs. 
Spirorbinae, dextral and sinistral 
Hartman, 1954^, p. 641. eniwetok: Parry 
(L), Eniwetok (0,L), Igurin (L), Rigili (O, 
L), Engebi (O), Aaraanbiru (O), Aniyaanii 
(0,L), and Bogen (0,L). bikini: Enyu (O). 
majuro: Uliga (O) . No attempt was made to 
identify these spirorbids. These small coiled 
tubes were attached to rocks, corals, vermetid 
snails, other snails, and algae. 
Vermiliopsis glandigerus Gravier 
Fauvel, 1953, p. 467, fig. 242 k. 
Vermiliopsis sp. Hartman, 1954 , 3 , p. 641. 
eniwetok: Parry (L), Igurini (6), Bogen 
(O), and it was reported as Vermiliopsis sp. by 
Hartman from Lidilbut (O) and Japtan (0,L) . 
Cosmopolitan in the warmer seas. 
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