Bay of St. Brieux, Brittany, France

trawled at 40 m depth in sand

H. 87.6 mm - W. 99.3 mm

Bay of St. Brieux, Brittany, France

trawled at 40 m depth in sand

H. 94.0 mm - W. 107.2 mm

Bay of St. Brieux, Brittany, France

trawled at 40 m depth in sand

H. 85.8 mm - W. 95.6 mm

Bay of St. Brieux, Brittany, France

dredged at 15 m depth in sand

H. 100.2 mm - W. 111.1 mm

Bay of Biscay, Western France

dredged in sand at 105 m depth

H. 66.2 mm - W. 74.1 mm

Bay of St. Brieux, Brittany, France

trawled at 40 m depth in sand

H. 103.7 mm - W. 117.7 mm

Liverpool Bay, NW. England, Irish Sea

dredged at 30 m depth in sand

H. 91.3 mm - W. 102.5 mm

Liverpool Bay, NW. England, Irish Sea

trawled by fisherman

H. 114.2 mm - W. 133.2 mm