38
R. I€. Nm.T.AR
(Fig. lGa and b). Numerous examples are to be found amongst the
Molgulidae, some in the Styelidae, and in the Pyuridae there are species
in which this adaptation occurs only in individuals which happen to be
on loose sediment (C. Monniot, 1965a).
The second type of adaptation is the possession of a stalk with a
a
C
mm
f
Flo. 16. Adaptations to loose substrata. a, Bathyatyeloiclea enderbyanua ; b, Dicatpa
pacibra; c , Polycatpa delta; d, Eugyra wrnbaeekae; e, Heteroatigma fagei; f, movemont of Heterostignra fagei amongst sand grains (c, redrawn from Monniot and
Monniot, 1968; e, f, redrawn from Monniot and Monniot, 1981).
R. I€. Nm.T.AR
(Fig. lGa and b). Numerous examples are to be found amongst the
Molgulidae, some in the Styelidae, and in the Pyuridae there are species
in which this adaptation occurs only in individuals which happen to be
on loose sediment (C. Monniot, 1965a).
The second type of adaptation is the possession of a stalk with a
a
C
mm
f
Flo. 16. Adaptations to loose substrata. a, Bathyatyeloiclea enderbyanua ; b, Dicatpa
pacibra; c , Polycatpa delta; d, Eugyra wrnbaeekae; e, Heteroatigma fagei; f, movemont of Heterostignra fagei amongst sand grains (c, redrawn from Monniot and
Monniot, 1968; e, f, redrawn from Monniot and Monniot, 1981).