Figure 8

Diversity of cells and cell debris in the thicker, proximal base of the genital operculum after the third embryonic molt (stage 20). Limulus polyphemus, prone. TEM. Some cells (C) near the periphery appear to be intact as though they could become part of the developing hypodermis (H). Other cells are deteriorating, leaving cell debris (CD), and thus making more space for the central lumen (L) and passage of hemolymph. A thin external cuticle (Cu) is evident. GH, granular hemocytes [29–31]. Scale, 5 μm.