Figure 2
From: A 390 million-year-old hyper-compound eye in Devonian phacopid trilobites
Interior structure of the eye capsule. (a) Chotecops (Phacops) ferdinandi (Kayser, 1880).WS 295 (SNSB-BSPG 1930 III 8). (b) ct of the right eye of a), note the tube at the distal end of the capsule (arrow). (c) Deeper section of (b), note the 'cube'-like structures below the 'fibers'. (d) X-ray of (a), made by Stürmer. (e) Deeper section of (c), note the hierarchically ordered spherical structures (arrow) below of the 'cubes' as shown in (c), and the filamentous structure distally. (f) Asteropyge (Rhenops) sp. (WS 2236), showing an eye capsule (arrow), [this specimen was not provided with any scale].
