FIGURE 11. Large spiralled serpulid tube. The tube was present in the test-tube labelled "Serpula vermicularis" by F.A. Potts but should rather be attributed to Hydroides heterocerus (The nominal "Serpula vermicularis" specimen collected by the Cambridge Expedition in the Gulf of Suez that was described in detail by Potts 1928 was no longer present [CUZM]). The abdominal uncini and chaetae shown below were found on skin still attached to the lumen of the tube. A—Upper view of tube (note spirorbid tubes encrusted on outer surface of the tube), B—Ventral view of tube, C—3/4 frontal view of tube, D—Abdominal uncinus, lateral view, F+5, E—Same, frontal view, left, F+10, F—Abdominal chaetae. Scales: A, B—5 mm, C—1 mm, D, F—10 µm.