title: ON THE FINE STRUCTURE OF THE AMPHIOXUS PHOTORECEPTOR.
mesh_terms: D000818:Animals; D043344:Chordata; D004583:Electrons; D006652:Histological Techniques; D006653:Histology; D064175:Lancelets; D008853:Microscopy; D008854:Microscopy, Electron; D012106:Research; D011984:Sensory Receptor Cells
keywords: CHORDATA; EXPERIMENTAL LAB STUDY; HISTOLOGY; MICROSCOPY, ELECTRON; RECEPTORS, NEURAL