A superb large complete isolated calyx, 43 mm by 35 mm, showing all the individual plates with some 10 mm of attached stem. On the upper surface the first two ossicles of each of the 10 arms are attached and the large central cavity shows excellent detail of the plates. From Bradford-on-Avon, Wiltshire
Size: 57 mm by 35 mm
Size: 57 mm by 35 mm