2. STEROLS: STRUCTURE AND DISTRIBUTION
141
TABLE VII
STEROLS OF MOLLUSKS
Classification
Unsaponi- Sterol of
nable
unsaponifraction
fiable
of fat
fraction
(%)
(%)
Sterol or
m.p. of steryl
acetate
Δ
5 ·
7 -
Sterols
in
mixture
(%)
Class Amphineura
Subclass Polyplacophora (chitons)
Family Acanthochitidae
Acanthochiton rubrolineatus (134)
Family Chitonidae
Chiton tuberculatus
Liolophura japonica
(133, 134)
Class Gastropoda
Subclass Prosobranchia
Order Archeogastropoda
Family Haliotidae (ear shells)
Haliotis gigantea (157)
(abalone)
Family Patellidae
Cellana nigrolineata (138)
Cellana toruema (158)
Family Trochidae
Tegula argyrostoma (159)
Tegula xanthostigma (160)
Monodonta labio (158)
Family Turbinidae (turban
shells)
Lunella coronata
coreensis (161)
Turbo cornutus (161)
Family Neritidae
Nerita peleronta (bleeding
tooth shell) (162)
Order Mesogastropoda
Family Viviparidae
Viviparus japonicus (163)
Viviparus malleatus (163)
Family Littorinidae
(periwinkles)
Littorina littorea (148)
Order Stenoglossa
Family Muricidae
23
44
A
7 -Sterol
—
11
30
A
7 -Cholestenol
—
22
53
A
7 -Cholestenol
—
23
24
24
16
11
25
43
—
59
—
72
Cholesterol
114-115°
114°
Cholesterol
Cholesterol
Cholesterol
0.3
—
—
1.2
—
0.2
23
30
—
26
23
69
63
—
47
50
Cholesterol
Cholesterol
Cholesterol
Cholesterol
0
Cholesterol
0
Cholesterol
0.6
0.5
—
6.0
6.0
9.6