"Section through the lateral eye of Euscorpius italicus. lens, Cuticular lens. nerv.c, Retinal cells (nerve-end cells). rhabd, Rhabdomes. nerv.f, Nerve fibes of the optic nerve. int, Intermediate cells (lying between the bases of the retinal cells)." — The Encyclopedia Britannica, 1910

Euscorpius Italicus

"Section through the lateral eye of Euscorpius italicus. lens, Cuticular lens. nerv.c, Retinal cells…