Calcified base plate, with radial lines, of recently removed B. balanus. Cavity area indicated by adhering orange flesh. Wall thickness and rectangular ends of pores indicated by periphery clear of flesh. Menai Strait, Wales. September 2009.
Calcified base plate, with radial lines, of recently removed B. balanus. Cavity area indicated by adhering orange flesh. Wall thickness and rectangular ends of pores indicated by periphery clear of flesh. Menai Strait, Wales. September 2009.