Ultrastructure of the primary spectacle and cornea of the sea lamprey.
D000818:Animals; D003315:Cornea / Q000166:cytology* / Q000254:growth & development; D003593:Cytoplasm; D005123:Eye / Q000166:cytology*; D005399:Fishes / Q000033:anatomy & histology*; D008854:Microscopy, Electron