Correction for Johnson et al., Sutural loosening and skeletal flexibility during growth: determination of drop-like shapes in sea urchins

Correction for ‘Sutural loosening and skeletal flexibility during growth: determination of drop-like shapes in sea urchins’ by A. S. Johnson, O. Ellers, J. Lemire, M. Minor and H. A. Leddy (Proc. R. Soc. Lond. B 269 , 215–220. (doi: 10.1098/rspb.2001.1881)). On page 215, the digital object identifier was incorrectly given. It should read 10.1098/rspb.2001.1881.