title: FURTHER OBSERVATIONS ON THE FINE STRUCTURE OF SOME INVERTEBRATE EYES.
mesh_terms: D000818:Animals; D000845:Annelida; D003063:Cnidaria; D003315:Cornea; D004447:Echinodermata; D004583:Electrons; D005123:Eye; D006654:Histology, Comparative; D007448:Invertebrates; D007908:Lens, Crystalline; D008853:Microscopy; D008854:Microscopy, Electron; D012106:Research; D011984:Sensory Receptor Cells; D012908:Snails
keywords: ANNELIDA; COELENTERATA; CORNEA; ECHINODERMATA; EXPERIMENTAL LAB STUDY; EYE; HISTOLOGY, COMPARATIVE; LENS, CRYSTALLINE; MICROSCOPY, ELECTRON; RECEPTORS, NEURAL; SNAILS