title: Light microscopic studies on the pineal organ in teleost fishes with special regard to its function.
mesh_terms: D000818:Animals; D002467:Cell Nucleus; D003594:Cytoplasmic Granules; D005399:Fishes / Q000033:anatomy & histology*; D009454:Neurofibrils; D010786:Photoreceptor Cells; D010870:Pineal Gland / Q000033:anatomy & histology* / Q000294:innervation / Q000378:metabolism