Red rock crab; Grapsus grapsus; and spider crab; Maia squinado. Handcoloured copperplate stipple engraving from Jussieu's 鈥楧ictionary of Natural Science;' Florence; Italy; 1837. Illustration by J. G. Pretre; engraved by Cellai; directed by Pierre Jean-Francois Turpin; and published by Batelli e Figli. Jean Gabriel Pretre (1780~1845) was painter of natural history at Empress Josephine's zoo and later became artist to the Museum of Natural History.