Keywords: FMIB 52879 Drawing illustrating the various degrees of union of the mantle lobes- A, mantle completely open; B, rudiments of siphons.jpeg check categories 11 September 2015 2 Drawing illustrating the various degrees of union of the mantle lobes A mantle completely open; B rudiments of siphons mantle still completely open; C mantle closed at one point; D mantle closed at two points with complete formation of siphonal apertures; E development of siphons ventral closure more extended; F mantle closed at three points with fourth orifice f foot s a s b anal and branchial siphons; 1 2 3 first second and thrid points of closure of mantle; b a byssal aperture Subject Bivalves--Anatomy Tag Mollusks 1903 Cite book Sea-Beach at Ebb-Tide Arnold Augusta Foote New York Century Co 1903 412 Creator Augusta Foote Arnold PD-UWASH-FMIB Institution University of Washington FMIB-source accession number 52879 Images from the Freshwater and Marine Image Bank to check Augusta Foote Arnold Mollusca |