File:EB1911 Cephalopoda Fig. 11.—Relations of the four nephridial sacs, viscero-pericardial sac, heart and large vessels in Nautilus.jpg
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EB1911_Cephalopoda_Fig._11.—Relations_of_the_four_nephridial_sacs,_viscero-pericardial_sac,_heart_and_large_vessels_in_Nautilus.jpg (439 × 358 pixels, file size: 29 KB, MIME type: image/jpeg)