SCATOLOGICAL STUDIES OF THE BIVALVIA (MOLLUSCA)
323
Remarks: Above description may be based on some atypical specimens.
Glycy meridae
The general plan of the faecal ribbons of this family shows a close
resemblance to that of the Arcidae (Pellet-type 111-10).
20. Glycymeris imperialis Kuroda (Fig. 5D)
This species passes unsculptured faecal ribbons crescentic in section. They are thin at the centre, while thickened at both edges.
They are rather coarse in texture and greyish-chocolate in colour.
Sometimes they are cut by fine occasional clefts (Pellet-type 111-10).
Locality : Suruga Bay (80 m in depth), Japan.
Measurements: For an animal with shell 21.0 mm long, the average
width of the faecal ribbons is 0-47 mm, and for one with shell 21.5 mm
long it is 0.44 mm.
21. G. rotunda (Dunker)
in texture and cream yellow in colour (Pellet-type 111-10).
Locality : Sagami Bay (87-95 m in depth), Japan.
Measurements: Width of faecal ribbons shed by an animal with shell
29.5 mm long is 0.50 mm on average.
Pellets are ribbon-shaped without surface sculptures. They are fine
Limopsidae
This family presents a striking contrast in pellet-characters to other
families of this order. The pellets of the members of this family so far
studied belong to Pellet-type 11-4.
22. Oblimopa forskalii (A. Adams)
with soft and frail consistency (Pellet-type 11-4).
Locality : Chijiwa Bay, off Tomioka, Kumamoto, Japan.
Measurements: Faecal rods voided by an animal with 9.5 mm long
shells are 0.18 mm in average breadth.
Faecal pellets of this species consist of an ungrooved cylindrical rod
23. ?Limopsis tajirnae Sowerby (Fig. 5c)
Faecal rods of this species are somewhat irregular in shape. They
323
Remarks: Above description may be based on some atypical specimens.
Glycy meridae
The general plan of the faecal ribbons of this family shows a close
resemblance to that of the Arcidae (Pellet-type 111-10).
20. Glycymeris imperialis Kuroda (Fig. 5D)
This species passes unsculptured faecal ribbons crescentic in section. They are thin at the centre, while thickened at both edges.
They are rather coarse in texture and greyish-chocolate in colour.
Sometimes they are cut by fine occasional clefts (Pellet-type 111-10).
Locality : Suruga Bay (80 m in depth), Japan.
Measurements: For an animal with shell 21.0 mm long, the average
width of the faecal ribbons is 0-47 mm, and for one with shell 21.5 mm
long it is 0.44 mm.
21. G. rotunda (Dunker)
in texture and cream yellow in colour (Pellet-type 111-10).
Locality : Sagami Bay (87-95 m in depth), Japan.
Measurements: Width of faecal ribbons shed by an animal with shell
29.5 mm long is 0.50 mm on average.
Pellets are ribbon-shaped without surface sculptures. They are fine
Limopsidae
This family presents a striking contrast in pellet-characters to other
families of this order. The pellets of the members of this family so far
studied belong to Pellet-type 11-4.
22. Oblimopa forskalii (A. Adams)
with soft and frail consistency (Pellet-type 11-4).
Locality : Chijiwa Bay, off Tomioka, Kumamoto, Japan.
Measurements: Faecal rods voided by an animal with 9.5 mm long
shells are 0.18 mm in average breadth.
Faecal pellets of this species consist of an ungrooved cylindrical rod
23. ?Limopsis tajirnae Sowerby (Fig. 5c)
Faecal rods of this species are somewhat irregular in shape. They