Keywords: FMIB 49855 Stages in development of the shipworms A, Free-swimming or larval stage B, Creeping stage after settling on surface of wood C.jpeg check categories 17 September 2015 2 Stages in development of the shipworms A Free-swimming or larval stage B Creeping stage after settling on surface of wood C Stage shortly after beginning to burrow A Teredo after Quatrefages B and C Xylotrya after Sigerfoos Subject Shipworms Marine borers Tag Mollusks 1921 Cite book Report on the San Francisco Bay Marine Piling Survey San Francisco Bay Marine Piling Committee San Francisco CA San Francisco Bay Marine Piling Committee 1921 1st Plate 26 Fig 2 San Francisco Bay Marine Piling Committee PD-UWASH-FMIB Institution University of Washington FMIB-source accession number 49855 Images from the Freshwater and Marine Image Bank to check San Francisco Bay Marine Piling Committee Mollusca |