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"Dissection of lob-worm from dorsal surface. m., Opening of retracted buccal cavity; i., gullet; gl., diverticula on first diaphragm; gl''., oesophageal glands; d., dorsal blood vessels; ef1., first efferent branchial; g., stomach intestine; n6., sixth nephridium; ef 13., thirteenth efferent branchial; af13., thirteenth afferent branchial; a., anus; af1., first afferent branchial; h., heart of left side." -Thomson, 1916

Lob Worm

"Dissection of lob-worm from dorsal surface. m., Opening of retracted buccal cavity; i., gullet; gl.,…