340
ILOHM-43 T. ARAKAWA
Remarks : The pellets of this species have been described by Moore
( I93 1 a) under the name of Pecten septemradiatus.
71. Palliolum randolphi (Dall) (Fig. 7 ~ )
Faecal pellets of this species are discharged in the form of a ribbon
with two longitudinal grooves on the dorsal side, unlike those of other
species of this family. There is no sculpture on the other side. They are
coarse in texture, yellowish-brown in colour but not homogeneous in
consistency (Pellet -type 111- 1 Oa).
Locality : Sagami Bay (90 m in depth), Japan.
Measurements : Width of the ribbons is 0.3 mm for an animal of shell
length 18.5 mm.
Limidae
Apart from the genus Mantellum in which faecal pellets take the
peculiar form of a helical spring, most of the representatives of this
family produce considerably blurred rod-like faecal bodies with numerous irregular striae. They consist partially of constituent rodlets
interwoven with a considerable amount of flocculent matter entangled
with mucus (Pellet-type 11-8a).
72. Lima lima L.
‘‘ 1 animal. This individual, 37 mm long, shed rod-shaped pellets
which appeared circular in cross-section. The pellets, 0-9 to 1.2 mm long
and 0.23 mm wide, were irregular in outline and transversely striated.”
(Manning and Kumpf, 1959, p. 303.) (Pellet-type 11-8a).
73. L. sowerbyi Deshayes (Pl. 4-45)
“ In this species, thin thread-like constituent rods are compacted
into cylindrical rods, usually voided in pieces of a length three to four
times as long as the diameter. They are formed almost entirely of
detrital matter mingled with some diatom frustules. The pelletdiameter fluctuates from 0.42 mm to 0.44 mm.” (Arakawa, 1965, p. 16,
P1. IV, Fig. 45.) (Pellet-type 11-8a).
74. Promantellum orientale (Ad. and Rve)
This species voids short rod-like faecal pellets which consist partially
of constituent rodlets with an admixture of flocculent matter entangled
by mucus. They are very soft and friable in consistency and very
similar to those described above (Pellet-type ZII-8a).
ILOHM-43 T. ARAKAWA
Remarks : The pellets of this species have been described by Moore
( I93 1 a) under the name of Pecten septemradiatus.
71. Palliolum randolphi (Dall) (Fig. 7 ~ )
Faecal pellets of this species are discharged in the form of a ribbon
with two longitudinal grooves on the dorsal side, unlike those of other
species of this family. There is no sculpture on the other side. They are
coarse in texture, yellowish-brown in colour but not homogeneous in
consistency (Pellet -type 111- 1 Oa).
Locality : Sagami Bay (90 m in depth), Japan.
Measurements : Width of the ribbons is 0.3 mm for an animal of shell
length 18.5 mm.
Limidae
Apart from the genus Mantellum in which faecal pellets take the
peculiar form of a helical spring, most of the representatives of this
family produce considerably blurred rod-like faecal bodies with numerous irregular striae. They consist partially of constituent rodlets
interwoven with a considerable amount of flocculent matter entangled
with mucus (Pellet-type 11-8a).
72. Lima lima L.
‘‘ 1 animal. This individual, 37 mm long, shed rod-shaped pellets
which appeared circular in cross-section. The pellets, 0-9 to 1.2 mm long
and 0.23 mm wide, were irregular in outline and transversely striated.”
(Manning and Kumpf, 1959, p. 303.) (Pellet-type 11-8a).
73. L. sowerbyi Deshayes (Pl. 4-45)
“ In this species, thin thread-like constituent rods are compacted
into cylindrical rods, usually voided in pieces of a length three to four
times as long as the diameter. They are formed almost entirely of
detrital matter mingled with some diatom frustules. The pelletdiameter fluctuates from 0.42 mm to 0.44 mm.” (Arakawa, 1965, p. 16,
P1. IV, Fig. 45.) (Pellet-type 11-8a).
74. Promantellum orientale (Ad. and Rve)
This species voids short rod-like faecal pellets which consist partially
of constituent rodlets with an admixture of flocculent matter entangled
by mucus. They are very soft and friable in consistency and very
similar to those described above (Pellet-type ZII-8a).