SCATOLOGICAL STUDIES OF THE BIVALVIA (MOLLUSCA)
367
153. Solen strictus Gould (PI. 4-52)
“ The faecal pellets are cylindrical and rod-shaped. The surface is
fine and smooth except for occasional transverse cracks. For an
examined animal, the pellets range from 0.95 to 1.08 mm in diameter.”
(Arakawa, 1963, p. 207, Text-Fig. 6-L.) (Pellet-type IA-3 (?II-4)).
Remarks : The pellets of this species have been described by Arakawa
(1963) under the name of S. gouldi Conrad.
154. 8. gordonis Yokoyama
Pellets are discharged in the form of a short rod with a faint spiral
striation and with truncate ends. They are very fine in surface texture
and brownish-grey in colour. The length/breadth ratio is 2.19 (Pellettype 1-2).
Locality : Mukaishima, Hiroshima, Japan.
Measurements when size of producer is 85-0 mm in shell length :
Length of pellet (mm)
Breadth of pellet (mm)
Ratio lengthlbreadth
1.54 1.95 1.12 1.30 1.30 1.31 1-55 1.55 1-95
0.69 0.69 0.69 0.69 0.69 0-69 0.69 0.69 0.69
2.23 2.83 1.62 1.88 1.88 1.90 2.25 2.25 2.83
Novaculidae
155. SinonowacuEa constricta (Lam.) (Fig. 1 lc)
They are
fulvous yellow in colour. Frequently they are cut by occasional cracks
(Pellet -type 11-4).
Locality : Otoshima, Okayama, Japan.
Measurements : Breadth of faecal rods fluctuates between 0.28 and
0.30 mm for an animal with a 22 mm-long shell.
The pellets are plain rods in shape with fine texture.
Hiatellidae
156. Hiatella Jlaccida (Gould) (Fig. 10 bottom)
This species voids segmented rod-like, or truncate-ended ovoid,
pellets. The ovoids are very irregular in size and shape, and fine and
uniform in surface texture. The lengthlbrendth ratio varies greatly
(Pellet-type IA-3 (1-I?)).
367
153. Solen strictus Gould (PI. 4-52)
“ The faecal pellets are cylindrical and rod-shaped. The surface is
fine and smooth except for occasional transverse cracks. For an
examined animal, the pellets range from 0.95 to 1.08 mm in diameter.”
(Arakawa, 1963, p. 207, Text-Fig. 6-L.) (Pellet-type IA-3 (?II-4)).
Remarks : The pellets of this species have been described by Arakawa
(1963) under the name of S. gouldi Conrad.
154. 8. gordonis Yokoyama
Pellets are discharged in the form of a short rod with a faint spiral
striation and with truncate ends. They are very fine in surface texture
and brownish-grey in colour. The length/breadth ratio is 2.19 (Pellettype 1-2).
Locality : Mukaishima, Hiroshima, Japan.
Measurements when size of producer is 85-0 mm in shell length :
Length of pellet (mm)
Breadth of pellet (mm)
Ratio lengthlbreadth
1.54 1.95 1.12 1.30 1.30 1.31 1-55 1.55 1-95
0.69 0.69 0.69 0.69 0.69 0-69 0.69 0.69 0.69
2.23 2.83 1.62 1.88 1.88 1.90 2.25 2.25 2.83
Novaculidae
155. SinonowacuEa constricta (Lam.) (Fig. 1 lc)
They are
fulvous yellow in colour. Frequently they are cut by occasional cracks
(Pellet -type 11-4).
Locality : Otoshima, Okayama, Japan.
Measurements : Breadth of faecal rods fluctuates between 0.28 and
0.30 mm for an animal with a 22 mm-long shell.
The pellets are plain rods in shape with fine texture.
Hiatellidae
156. Hiatella Jlaccida (Gould) (Fig. 10 bottom)
This species voids segmented rod-like, or truncate-ended ovoid,
pellets. The ovoids are very irregular in size and shape, and fine and
uniform in surface texture. The lengthlbrendth ratio varies greatly
(Pellet-type IA-3 (1-I?)).