On the mucous secretion from the proboscis in Harrimania kupfferi (Enteropneusta).
D000818:Animals; D002816:Chordata, Nonvertebrate / Q000502:physiology*; D004847:Epithelial Cells; D066298:In Vitro Techniques; D008854:Microscopy, Electron; D009093:Mucus; D012636:Secretory Rate