Fig. 26.—Sectional view of photogenic organ of Acanthephyra debelis (after Kemp). n, nerve; s. l., sheathing layer of cells; g, cone of refractive granules at end of nerve strand; c, cellular layer; i. l., m. l., o. l., inner, middle and outer layer of lens.
Fig. 27.—Sectional view of photogenic organ of Sergestes prehensilis (after Terao). bm, basement membrane; cs, connective strands of photogenic layer; hy, hypodermis; l1, l2, l3, layers of lens; le, lens epithelium; n, nerve; ph, photogenic cells; pi, pigment layer; r, reflector; th, theca.
