Keywords: Walcott Cambrian Geology and Paleontology II plate 09.jpg Plate 9 Middle Cambrian Holothurians Eldonia 1 Eldonia ludwigi <small>Walcott</small> 2 Eldonia ludwigi <small>Walcott</small> 3 Eldonia ludwigi <small>Walcott</small> 4 Eldonia ludwigi <small>Walcott</small> 5 Eldonia ludwigi <small>Walcott</small> Charles D Walcott Middle Cambrian Holothurians and Medusae Smithsonian Miscellaneous Collections Volume 57 Number 3 Publication 2011 City of Washington Published by the Smithsonian Institution June 13 1911 Creator Charles Doolittle Walcott 1911 PD-old-80 Walcott Cambrian Geology and Paleontology II plates Walcott Cambrian Geology and Paleontology II plates missing identification |