Náttúrufræðingurinn - 1977, Síða 36

þessa kalla fram ileiri spurningar en
þær svara. Fjaran er ilókið vistkerfi
og margt er enn á huldu um lifnaðar-
liætti þeirra dýra sem þar lifa.
HEIMILDIR
Garðarsson, Arnþór, 1973: Nýjungar um
íslenska burstaorma. Náttúruir. 43:
77-91.
Gunnarsson, Karl og Erlingur Hauksson,
1973: Nokkrar athuganir á fjörum
við norðaustanverðan Breiðafjörð.
Náttúrufræðistofnun íslands (hand-
rit).
Ingólfsson, Agnar, 1975: Lífríki fjörunn-
ar. Rit Landverndar, 4, bls. 61—99.
Ritstj. Arnþór Garðarsson. Reykja-
vík.
Lewis, J. R., 1972: The Ecology of Rocky
Shores. London.
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Zool. Icel. 4 (63). Copenhagen and
Reykjavík.
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(Lamellibranchia). 2. útg. Reykjavík.
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d’Islande (Isopodes, Assellotes). Arch.
Zool. exp. gún. 113: 433—437.
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Tannidacea. Zool. Icel. 3 (27). Cop-
enhagen and Reykjavík.
— 1938: Cirripedia (incl. Rhizocephala).
Zool. Icel. 3 (30—31). Copenhagen
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— 1939: Crustacea Decapoda. Zool. Icel.
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S U M M A R Y
Distribution and habitat of marine
littoral invertebrates in Breida-
ijördur, W-Iceland
by Erlingur Hauksson
Institute of Marine Biology,
University of Bergen,
Espegrend,
N-5065 Blömsterdalen, Norway.
Distribution of marine littoral inverte-
brates in the large bay Breidafjördur, W-
Iceland (Fig. 1), was studied in summer
1973.
71ie most common shore-type in
Breidafjördur are sheltered mud flats,
with heavy growth of Ascopyllum ?iodos-
um (L.) Le Jol. on stones and low cliffs.
The most abundant species were: the
gastropods, Littorina saxatilis (Olivi),
Littorina obtusata (L.) (sensu lato), Thais
lapillus (L.), Onoba aculeus (Gould) and
Skeneopsis planorbis (Fabricius); the bi-
valves Cyamium minutum (Fabricius)
ancl Mytilus edulis (L.); the cirriped Bal-
anus balanoides (L.); the amphipod
Marinogammarus obtusatus (Dahl); and
the polychaetes, Arenicola marina (L.),
Fabricia sabella (Ehrenberg) and Pygo-
spio elegans (Claparéde). Most of them
are generally abundant in the littoral zone
around Iceland.
The lollowing species reached the
northern limit of their known Icelandic
range in Breidafjördur: the cirriped Bal-
anus crenatus (Bruguiére); the amphipod
Marinogammarus marinus (Leach); and
the polychaetes Scolelepis girardi (Qua-
trefages), Nerine cirratulus (delle Chiaje)
ancl Polydora ciliata (Johnston).
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