Keywords: Walcott Cambrian Geology and Paleontology II plate 07.jpg Plate 7 Cambrian and pre-Cambrian Merostomata Sidneyia and Beltina 1 Sidneyia inexpectans <small> Walcott </small> 2 Beltina danai <small> Walcott </small> 2a Beltina danai <small> Walcott </small> 3 Beltina danai <small> Walcott </small> 4 Beltina danai <small> Walcott </small> Charles D Walcott Middle Cambrian Merostomata Smithsonian Miscellaneous Collections Volume 57 Number 2 Publication 2009 City of Washington Published by the Smithsonian Institution April 8 1911 Creator Charles Doolittle Walcott J M Jessup 1911 PD-old-80 Walcott Cambrian Geology and Paleontology II plates Walcott Cambrian Geology and Paleontology II plates missing identification |