The Echinoid Directory

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Ceratophysa ceratopyga (A. Agassiz, 1879). Recent; Antarctic. Posterior view, from Agassiz, A. 1881. Report on the scientific results of the voyage of H.M.S. Challenger during the years 1873-76. Zoology III, part 9, Report on the Echinoidea. Her Majesty's Stationary Office, London (plate 28).

Length of test 80 mm.