title: A new type of neurosecretion in the cerebral ganglion of a sipunculid.
mesh_terms: D000818:Animals; D001921:Brain / Q000502:physiology; D005724:Ganglia / Q000502:physiology* / Q000648:ultrastructure; D006651:Histocytochemistry; D007448:Invertebrates / Q000502:physiology*; D009489:Neurosecretion