Pierced stone. Ovoid shape and flattened section. Four communicating holes in pairs are crossing the pebble lengthways. Human workmanship seems limited to a groove serving as a passage for fastenings, along one the extremities. Used for weighting.
The stone shows minute sub-circular perforations caused by bioerosion of endolithic boring sponges (family Clionaidae).
MEDAGLIA 2002, pp. 177-178
REFERENCES
Medaglia S. 2002, Materiali erratici dal mare di Kaulonia, in Archeologia Subacquea, Studi Ricerche, Documenti, III, pp. 163-185.