SCATOLOGICAL STUDIES OF THE BIVALVIA (MOLLUSCS)
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Pellet-type 5. Rod with a coiled groove
Moore (1931a) examined this type of pellet in two families of
Gastropempta, Myidae (Mya truncata) and Pholadidae (Pholadidea
loscombiana). The faecal rod is here marked with a dextrally coiled
groove unlike those of Tectura and other gastropod species where the
coiling is sinistral.
Pellet-type 6. Rod with a longitudinal groove
This type of pellet is known to occur in some of the Protobranchia
(Nuculanidae). It is characterized by bearing one longitudinal groove
which may be produced by a major typhlosole in the post-intestine.
Pellet-type 7. Rod with jive longitudinal grooves
This type can be distinguished by its 5-lobed section, but in addition, the following two forms (a and b) are peculiar to the Nuculidae
(Protobranchia). All consist of a grooved rod of compact detritus.
Moore (1933) examined the pellets of NuczLla and noted that there is a
significant distinction in position and depth of the grooves between
different species within the genus.
Pellet-type 7a. Rod with seven longitudinal grooves
This type of pellet is characterized by having seven longitudinal
grooves and there is a specific difference in both position and depth of
the external grooves between different species.
Pellet-type 7 b . Rod with nine longitudinal grooves
possessing additional longitudinal grooves.
This type of pellet is distinguishable from the preceding two by
Pellet-type 8. Rodlet wound into a ball
This type of pellet consists of a ball which is composed of filiforrn
rodlets mixed with a large amount of viscous substance. It is possibly
produced by the Amusiidae (Amusium) and some of the Pectinidae
(Pecten) (Gastrotetartika).
Pellet-type 8a. Rodlet wound into a rod
This type of pellet consists of a rod loosely packed by filiform rodlets
with a large amount of flocculent material. At times, the constituent
rodlets are coiled in regular pattern. It is probably produced by many
of the Limidae (Gastrotetartika).
315
Pellet-type 5. Rod with a coiled groove
Moore (1931a) examined this type of pellet in two families of
Gastropempta, Myidae (Mya truncata) and Pholadidae (Pholadidea
loscombiana). The faecal rod is here marked with a dextrally coiled
groove unlike those of Tectura and other gastropod species where the
coiling is sinistral.
Pellet-type 6. Rod with a longitudinal groove
This type of pellet is known to occur in some of the Protobranchia
(Nuculanidae). It is characterized by bearing one longitudinal groove
which may be produced by a major typhlosole in the post-intestine.
Pellet-type 7. Rod with jive longitudinal grooves
This type can be distinguished by its 5-lobed section, but in addition, the following two forms (a and b) are peculiar to the Nuculidae
(Protobranchia). All consist of a grooved rod of compact detritus.
Moore (1933) examined the pellets of NuczLla and noted that there is a
significant distinction in position and depth of the grooves between
different species within the genus.
Pellet-type 7a. Rod with seven longitudinal grooves
This type of pellet is characterized by having seven longitudinal
grooves and there is a specific difference in both position and depth of
the external grooves between different species.
Pellet-type 7 b . Rod with nine longitudinal grooves
possessing additional longitudinal grooves.
This type of pellet is distinguishable from the preceding two by
Pellet-type 8. Rodlet wound into a ball
This type of pellet consists of a ball which is composed of filiforrn
rodlets mixed with a large amount of viscous substance. It is possibly
produced by the Amusiidae (Amusium) and some of the Pectinidae
(Pecten) (Gastrotetartika).
Pellet-type 8a. Rodlet wound into a rod
This type of pellet consists of a rod loosely packed by filiform rodlets
with a large amount of flocculent material. At times, the constituent
rodlets are coiled in regular pattern. It is probably produced by many
of the Limidae (Gastrotetartika).