More than 100 excavations have begun along 134 miles of the HS2 high-speed rail route being built between London and Birmingham as part of a £900m project.
This bizarre find joins another discovery of headless skeletons from the area's ancient past.
Archaeologists are working to find as many burials as possible before coastal erosion sweeps the medieval Welsh cemetery into the sea, ancient-origins reports.
Head of the Museums Department at the Ministry of Antiquities Ilham Saladin will inaugurate a temporary exhibition entitled "Rediscovering the Dead" on Jan 10.
Mostafa Waziri declared that researchers determined the gender and age of the skeletons found inside the Alexandria sarcophagus.