348
KOHMAPI' Y. ARAKAWA
Measurements when size of producer is 5.5 mm in shell length :
Length of pellet (mm)
Breadth of pellet (mm)
Ratio of lengthlbreadth
0.31 0.27 0-24 0.29 0.29 0.35 0.26 0.22 0.27
0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15
2.07 1.80 1.60 1.93 1.93 2.34 1.73 1.47 1.80
99. F . mutica (Rve) (PI. 4-47 ; Fig. 14, p. 397)
" Pellets of this species are rod-shaped, deeply constricted at regular
intervals of about 1.3 times as long as the diameter and readily broken
up into ovoid pieces with truncate end by a slight touch. They are fine,
very firm in consistency, coloured uniformly greyish-green and consist
entirely of fine detritus containing some diatom frustules. For aii
examined animal, the average diameter of pellets is 0.82 mm."
(Arakawa, 1965, p. 18, PI. V, Fig. 51.) (Pellet-type IA-3j.
100. Frigidocardium eos (Kuroda)
Pellets are ovoid in shape with flattened ends. They are fine in surface texture and yellowish-brown in colour. Ratio of lengthlbreadth of
the pellets is 1-64 on an average (Pellet-type 1-1).
Locality : Sagami Bay (87-95 m in depth), Japan.
Measurements when size of producer is unknown :
Length of pellet (mm)
Breadth of pellet (mm)
Ratio of lengthlbreadth
0-56 0.53 0.54 0.46 0.56 0.48 0.50 0.57 0.46 0.56
0.38 0.32 0-34 0.34 0.28 0.30 0.30 0.30 0.30 0.30
1.47 1.66 1.59 1.35 2.00 1.87 1.67 1.90 1.53 1.87
Measurements when size of producer is 20.5 mm in shell length :
Length of pellet (mm) 0.42 0.36 0-35 0.36 0.40
Breadth of pellet (mm) 0-24 0.24 0.26 0-25 0.24
Ratio of length/breadth 1-75 1.50 1.35 1.44 1-67
101. Laevicardium undatopictum (Pilsbry) (PI. 2-18)
The pellets are defecated normally in the form of a rod with a
definite linear segmentation. Occasionally, they are shed broken into
ovoid pieces with truncate ends. The surface of the pellets may be
impressed by faint transverse striae. They are fine, homogeneous and
KOHMAPI' Y. ARAKAWA
Measurements when size of producer is 5.5 mm in shell length :
Length of pellet (mm)
Breadth of pellet (mm)
Ratio of lengthlbreadth
0.31 0.27 0-24 0.29 0.29 0.35 0.26 0.22 0.27
0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15
2.07 1.80 1.60 1.93 1.93 2.34 1.73 1.47 1.80
99. F . mutica (Rve) (PI. 4-47 ; Fig. 14, p. 397)
" Pellets of this species are rod-shaped, deeply constricted at regular
intervals of about 1.3 times as long as the diameter and readily broken
up into ovoid pieces with truncate end by a slight touch. They are fine,
very firm in consistency, coloured uniformly greyish-green and consist
entirely of fine detritus containing some diatom frustules. For aii
examined animal, the average diameter of pellets is 0.82 mm."
(Arakawa, 1965, p. 18, PI. V, Fig. 51.) (Pellet-type IA-3j.
100. Frigidocardium eos (Kuroda)
Pellets are ovoid in shape with flattened ends. They are fine in surface texture and yellowish-brown in colour. Ratio of lengthlbreadth of
the pellets is 1-64 on an average (Pellet-type 1-1).
Locality : Sagami Bay (87-95 m in depth), Japan.
Measurements when size of producer is unknown :
Length of pellet (mm)
Breadth of pellet (mm)
Ratio of lengthlbreadth
0-56 0.53 0.54 0.46 0.56 0.48 0.50 0.57 0.46 0.56
0.38 0.32 0-34 0.34 0.28 0.30 0.30 0.30 0.30 0.30
1.47 1.66 1.59 1.35 2.00 1.87 1.67 1.90 1.53 1.87
Measurements when size of producer is 20.5 mm in shell length :
Length of pellet (mm) 0.42 0.36 0-35 0.36 0.40
Breadth of pellet (mm) 0-24 0.24 0.26 0-25 0.24
Ratio of length/breadth 1-75 1.50 1.35 1.44 1-67
101. Laevicardium undatopictum (Pilsbry) (PI. 2-18)
The pellets are defecated normally in the form of a rod with a
definite linear segmentation. Occasionally, they are shed broken into
ovoid pieces with truncate ends. The surface of the pellets may be
impressed by faint transverse striae. They are fine, homogeneous and