title: Two new kinds of retinal cells in the eye of a snail, Helix aspersa.
mesh_terms: D000818:Animals; D001369:Axons / Q000648:ultrastructure; D003594:Cytoplasmic Granules; D003712:Dendrites / Q000648:ultrastructure; D005724:Ganglia / Q000648:ultrastructure; D006372:Helix, Snails / Q000648:ultrastructure*; D008854:Microscopy, Electron; D009474:Neurons / Q000648:ultrastructure; D009940:Organoids / Q000648:ultrastructure; D010786:Photoreceptor Cells / Q000648:ultrastructure; D010860:Pigments, Biological; D012160:Retina / Q000166:cytology / Q000648:ultrastructure*; D012908:Snails / Q000648:ultrastructure*
chemical_list: D010860:Pigments, Biological