title: [Optic structure of the ommatidium of the king-crab, Xyphosura polyphemus].
mesh_terms: D001181:Arthropods; D003315:Cornea / Q000033:anatomy & histology*; D005123:Eye / Q000033:anatomy & histology*
vernacular_title: Structure optique de l'ommatidie de la limule Xyphosura polyphemus.