346
KOHMAN Y. ARAKAWA
Locality : Lake Shinji, Shimane, Japan.
Measurements: Pellets shed by an animal with a shell 24.9 mm long
fluctuate in breadth between 0.23 and 0.26 mm.
Ungulinidae
93. Joannisiella lunaris (Yokoyama) (PI. 2-17)
This species produces oval pellets with coarse texture (Pellet-type
1-1).
Locality : Tomioka, Kumamoto, Japan.
Measurements : For a specimen examined, the pellets fluctuated in size
between 0.20 x 0.24 mm and 0.20 x 0.27 mm.
Lucinidae
94. Pillucina pisidium (Dkr)
spherule.
greyish-yellow (Pellet-type 1-1 (ZIA-3)).
Locality : Akitsu, Hiroshima, Japan.
Measurements : For an animal with a shell 6.5 mm long, pellets fluctuate
in diameter between 0.04 and 0.07 mm.
Faecal pellets of this species are normally voided in the form of a
Colour is
But a t times, they are shed united in strings.
Tridacnidae
95. Tridacna (Vulgodacna) maxima (Roding) (Fig. 9c)
Faecal rods are normally cut by transverse cracks. They are fine in
texture and rather soft in consistency. The colour is yellowish-brown
(Pellet-type 11-4).
Locality : Yoron-jima, Kagoshima, Japan.
Measurements: Breadth of pellets averages 0.42 mm for a specimen
with a shell 76.0 mm long, and 0.65 mm for one with a shell 71.0 mm
long.
Cardiidae
Most of the representatives of the group which have thus far been
examined shed pellets that are either oval or a segmented rod of cornpact detritus (Pellet-type 1-1 and IA-3).