Keywords: Botryllus schlosseri 002.png en Botryllus schlosseri Pallas 1766 magnified showing two systems of 6 and 7 ascidiozooids; B one ascidiozooid extracted; a branchial orifice; b atrial orifice; c branchial sac; d stomach 1901 http //www biodiversitylibrary org/item/112021 page/1/mode/1up A Guide to the shell and starfish galleries of the British Museum p 98 British Museum Custom license marker 2012 02 26 PD-old Uploaded with UploadWizard Botryllus schlosseri Tunicata internal anatomy schemes whole body |