330
KOHMAN Y . ARAKAWA
17.5 mm shed small fragments of ribbon-shaped pellets 0.39 mm wide
and 0.55 to 0.59 mm long. The edges of the ribbon were highly recurved.
On one surface there was a longitudinal ridge ; the other surface was
smooth.” (Manning and Kumpf, 1950, I). 301, Figs. If, 4d.) (Pellet-type
111- 1Oa).
46. I . legumen (Gmel.) (PI. 1-10)
The faecal ribbons of this and the previous two animals are so much
alike in nature and form that it is difficult to draw a clear-cut distinction between them. The ribbons of this species are bi-crescentic in crosssection, coarse and fragile in consistency and greyish-brown in colour
(Pellet -type 111- 1 Oa) .
Locality : Shirahama, Wakayama, Japan.
Measurements : Pellets voided by an examined animal were 0.22 mm in
width.
Pteriidae (Aviculidae)
47. Pinctada martensii (Dkr) (PI. 4-40)
“ The faeces are thin corrugated ribbons with two lateral edges
weakly rolled up dorsalwards. As is often the case with ribbon-like
faeces, they are fragile and shed broken to pieces. In cross-section,
they are usually crescent ; starved animals seem to show a tendency t o
produce thinner and more delicate ribbons with two lateral edges
strongly rolled in to touch each other. The coloration is variable, from
greyish-brown to orange-yellow, according to staple of food taken by
the animal. On an average, the width of ribbons is 1-86 mm for an
animal with shells 4.92 cm long.” (Arakawa, 1963, p. 206, Text-Fig.
6, D.) (Pellet-type 111-10).
Pinnidae
Pellets of the members of this family may usually be produced in
the form of an ungrooved ribbon with a crescentic section (Pellet-type
111-1 0).
48. Pinna bicolor Gmel.
Faecal ribbons are thickened at both edges and are raised a t the
centre to form a median longitudinal ridge. On the other side of this,
there is no surface-sculpture. They are yellowish-grey in colour and
coarse in texture. At times, the ribbons may be built up from compacted
constituent rodlets (Pellet-type 111-10 ( ? I O U ) ) .
KOHMAN Y . ARAKAWA
17.5 mm shed small fragments of ribbon-shaped pellets 0.39 mm wide
and 0.55 to 0.59 mm long. The edges of the ribbon were highly recurved.
On one surface there was a longitudinal ridge ; the other surface was
smooth.” (Manning and Kumpf, 1950, I). 301, Figs. If, 4d.) (Pellet-type
111- 1Oa).
46. I . legumen (Gmel.) (PI. 1-10)
The faecal ribbons of this and the previous two animals are so much
alike in nature and form that it is difficult to draw a clear-cut distinction between them. The ribbons of this species are bi-crescentic in crosssection, coarse and fragile in consistency and greyish-brown in colour
(Pellet -type 111- 1 Oa) .
Locality : Shirahama, Wakayama, Japan.
Measurements : Pellets voided by an examined animal were 0.22 mm in
width.
Pteriidae (Aviculidae)
47. Pinctada martensii (Dkr) (PI. 4-40)
“ The faeces are thin corrugated ribbons with two lateral edges
weakly rolled up dorsalwards. As is often the case with ribbon-like
faeces, they are fragile and shed broken to pieces. In cross-section,
they are usually crescent ; starved animals seem to show a tendency t o
produce thinner and more delicate ribbons with two lateral edges
strongly rolled in to touch each other. The coloration is variable, from
greyish-brown to orange-yellow, according to staple of food taken by
the animal. On an average, the width of ribbons is 1-86 mm for an
animal with shells 4.92 cm long.” (Arakawa, 1963, p. 206, Text-Fig.
6, D.) (Pellet-type 111-10).
Pinnidae
Pellets of the members of this family may usually be produced in
the form of an ungrooved ribbon with a crescentic section (Pellet-type
111-1 0).
48. Pinna bicolor Gmel.
Faecal ribbons are thickened at both edges and are raised a t the
centre to form a median longitudinal ridge. On the other side of this,
there is no surface-sculpture. They are yellowish-grey in colour and
coarse in texture. At times, the ribbons may be built up from compacted
constituent rodlets (Pellet-type 111-10 ( ? I O U ) ) .