Figure 8: Transmission electron microscopy of ovotestis of older snails. (A) Association between spermatid and follicular cell layer of oocyte. (B) A portion of follicular cell layer that separates oocyte from rest of the acinar structure. Ooplasm possesses numerous mitochondria and lipid droplets. (C) Ooplasm and nucleoplasm are separated by nuclear membrane. Note the nuclear pore (arrow). (D) Chromatin materials in the nucleoplasm of the oocyte. fcl = follicular cell layer; lp = lipid droplet; mt = mitochondria; n = nucleus; opl = ooplasm; sc = spermatocyte; sd = spermatid.