Keywords: FMIB 49297 Calveria fenestrata, Wyville Thomson One of the four-valved pedicellariae.jpeg Calveria fenestrata Wyville Thomson One of the four-valved pedicellariae Subject Sea urchins Calveria Tag Invertebrates 1873 Cite book Depths of the Sea an account of the General Results of the Dredging Cruises of H M SS 'Porcupine' and 'Lightning' During the Summers of 1868 1869 and 1870 under the Scientific Direction of Dr Carpenter F R S J Gwyn Jeffreys F R S and Dr Wyville Thomson F R S Thomson C Wyville London England MacMillan and Co 1873 Fig 29 Creator Charles Wyville Thomson PD-UWASH-FMIB Institution University of Washington FMIB-source accession number 49297 Images from the Freshwater and Marine Image Bank to check Charles Wyville Thomson Araeosoma fenestratum |