The fine structure of the lens and photoreceptors of Nereis virens.
D000818:Animals; D000845:Annelida / Q000166:cytology*; D002462:Cell Membrane; D007908:Lens, Crystalline; D008027:Light; D010860:Pigments, Biological; D011984:Sensory Receptor Cells / Q000166:cytology*
D010860:Pigments, Biological