title: On the fine structure and distribution of secretory cells in the supraoesophageal ganglion of the lugworm (Arenicola marina L.).
mesh_terms: D000818:Animals; D001921:Brain / Q000166:cytology / Q000648:ultrastructure; D005724:Ganglia / Q000166:cytology* / Q000648:ultrastructure; D008854:Microscopy, Electron; D009474:Neurons / Q000648:ultrastructure; D009490:Neurosecretory Systems / Q000166:cytology* / Q000648:ultrastructure; D011077:Polychaeta / Q000166:cytology*