SCATOLOGICAI~ YTI'DIES OB THE BIVALVIA (MOLLlrSCA)
3.57
Measurements when size of producer is 14.0 mm in shell length :
Length of pellet (mm)
0.26 0-20 0.22 0-12 0.09 0.20 0.18
0-18 0.12 0.14 0-26 0.14 0.15 0.16 0.10 0.06 0.12
Breadth of pellet (mm)
0.28 0-26 0.26 0.26 0.26 0.25 0.26
0.27 0.25 0.28 0.28 0.26 0.26 0.27 0.24 0.20 0.24
Ratio 1 engt h/ breadth
0.93 0.77 0.85 0-46 0.35 0.80 0.69
0.67 0.48 0.50 0.93 0.54 0.58 0.59 0.42 0.30 0.50
1%. ThPora Euhrica (Hinds) (Pl. 2-24)
This species defecates typical round-ended oval pellets wittli no
grooves. Most of these are fine and homogeneous in surface texture and
composed almost entirely of fine grade detritus, but occasionally pellets
are coarse and sandy in appearance. Average lengthlbreadth ratio of
the pellets is 1.74 (Pellet-type 1-1).
Localities : Tomioka ; Kaita Bay ; Kure Bay, Japaii.
Measurements when size of producer is 9.5 mm in shell length :
Length of pellet (mm)
Breadth of pellet (mm)
Ratio lengthlbreadth
0.32 0.30 0.29 0.30 0.26 0.28 0.28 0-37 0.37
0.16 0-16 0.17 0.14 0.14 0.14 0.15 0.22 0.20
2.00 1.88 1-71 2.14 1.86 2.00 1-87 1.68 1.85
Measurements when size of producer is 8-5 mm in shell length :
Length of pellet (mm)
0.27 0.28 0.33 0.34 0.28 0.34 0.29
Breadth of pellet (mm)
0.18 0-18 0.14 0.18 0.17 0-18 0.16
Ratio lengthlbreadth
1.50 1.55 2-36 1.89 1.65 1-89 1.81
Measurements when size of producer is 7.0 mm in shell length :
Length of pellet (mm)
Breadth of pellet (mm)
Ratio lengthlbreadth
0.23 0.24 0.23 0.21 0.20 0.24 0.22 0.20 0.22 0.21
0.12 0.12 0.12 0.13 0.10 0.12 0.14 0-14 0.14 0.13
1.92 2.00 1-92 1-62 2.00 2.00 1.57 1.43 1.57 1.62
Measurements when size of producer is 6.5 mm in shell length :
Length of pellet (mm)
0.22 0.25 0.24 0.24 0.23 0.22 0.22 0.26 0-23 0-23 0.22 0.25
Breadth of pellet (mm)
Ratio length/breadth
1-83 2.08 2-18 2.18 2.09 2.00 1.89 2.00 1.92 1.92 1.83 2.08
0.12 0.12 0.11 0.11 0.11 0.11 0.13 0.13 0.12 0-12 0.12 0.12
3.57
Measurements when size of producer is 14.0 mm in shell length :
Length of pellet (mm)
0.26 0-20 0.22 0-12 0.09 0.20 0.18
0-18 0.12 0.14 0-26 0.14 0.15 0.16 0.10 0.06 0.12
Breadth of pellet (mm)
0.28 0-26 0.26 0.26 0.26 0.25 0.26
0.27 0.25 0.28 0.28 0.26 0.26 0.27 0.24 0.20 0.24
Ratio 1 engt h/ breadth
0.93 0.77 0.85 0-46 0.35 0.80 0.69
0.67 0.48 0.50 0.93 0.54 0.58 0.59 0.42 0.30 0.50
1%. ThPora Euhrica (Hinds) (Pl. 2-24)
This species defecates typical round-ended oval pellets wittli no
grooves. Most of these are fine and homogeneous in surface texture and
composed almost entirely of fine grade detritus, but occasionally pellets
are coarse and sandy in appearance. Average lengthlbreadth ratio of
the pellets is 1.74 (Pellet-type 1-1).
Localities : Tomioka ; Kaita Bay ; Kure Bay, Japaii.
Measurements when size of producer is 9.5 mm in shell length :
Length of pellet (mm)
Breadth of pellet (mm)
Ratio lengthlbreadth
0.32 0.30 0.29 0.30 0.26 0.28 0.28 0-37 0.37
0.16 0-16 0.17 0.14 0.14 0.14 0.15 0.22 0.20
2.00 1.88 1-71 2.14 1.86 2.00 1-87 1.68 1.85
Measurements when size of producer is 8-5 mm in shell length :
Length of pellet (mm)
0.27 0.28 0.33 0.34 0.28 0.34 0.29
Breadth of pellet (mm)
0.18 0-18 0.14 0.18 0.17 0-18 0.16
Ratio lengthlbreadth
1.50 1.55 2-36 1.89 1.65 1-89 1.81
Measurements when size of producer is 7.0 mm in shell length :
Length of pellet (mm)
Breadth of pellet (mm)
Ratio lengthlbreadth
0.23 0.24 0.23 0.21 0.20 0.24 0.22 0.20 0.22 0.21
0.12 0.12 0.12 0.13 0.10 0.12 0.14 0-14 0.14 0.13
1.92 2.00 1-92 1-62 2.00 2.00 1.57 1.43 1.57 1.62
Measurements when size of producer is 6.5 mm in shell length :
Length of pellet (mm)
0.22 0.25 0.24 0.24 0.23 0.22 0.22 0.26 0-23 0-23 0.22 0.25
Breadth of pellet (mm)
Ratio length/breadth
1-83 2.08 2-18 2.18 2.09 2.00 1.89 2.00 1.92 1.92 1.83 2.08
0.12 0.12 0.11 0.11 0.11 0.11 0.13 0.13 0.12 0-12 0.12 0.12