Slide showing diagrammatical drawing of 'Alimentary canal of Aphrodite aculeata'. Slide shows diagrammatical drawing of 'Alimentary canal of Aphrodite aculeata' (a marine polychaete worm, otherwise known as 'sea mouse' due to its amount of hairs). Drawing is labelled 'L', 'D', and 'Ph'. Title below image reads: 'Fig. 368. - Alimentary canal of Aphrodite aculeata (After M. Edwards). Ph pharynx; D intestine; L intestinal (hepatic) caeca.' Late 19th to early 20th century