ClipArt ETC
"An ommatidium or eye-element from the eye of the Lobster. c, cornea (cuticle); c.h., corneal hypodermis, which secretes the cuticle; co., cone cells; cr., crystalline cone; n, nuclei; n.f., nerve fibres; r.d., distal or outer retinula cells; r.p., proximal or inner retinula cells; rh., rhabdome." -Galloway, 1915

Lobster Ommatidium

"An ommatidium or eye-element from the eye of the Lobster. c, cornea (cuticle); c.h., corneal hypodermis,…