ClipArt ETC
"Section of compound eye of Mysis vulgaris. m., Muscle of eye-stalk; 1-4 ganglionic swellings in the course of the optic nerve; n., the nerve fibrils passing up to the retinulae; rh., the rhabdoms; re., elements of retinulae; p., band of pigment; c., crystalline cones; co., the corneal facets with the subjacent nuclei." -Thomson, 1916

Crustacean Compound Eye

"Section of compound eye of Mysis vulgaris. m., Muscle of eye-stalk; 1-4 ganglionic swellings in the…