|Description||Slide shows two diagrams of the 'Eye of Nereis'.|
Diagram 'a' is labelled with the letters 'c','e','l','h','r','n'.
Diagram 'b' is labelled with the letters 'h','p','c','f'.
There is a corresponding key which reads as follows:
'Fig. 130. - Eye of Nereis. (After Andrews.) x150. A, Section through the entire eye; c, cuticle; e, epidermis; l, lens; h, rods; r, retina; n, optic nerve: B, isolated retinal element; c, cell; p, pigment; h, rod; f, nerve-fibre.'
Nereis: polychaete worm.