Figure 3: Ovotestis of younger snails. (A) A more developed form of spermatid showing 9+2 microtubular arrangement in tail with modified nucleus and Golgi vesicles (white arrow). (B) The central canal of spermatid tail is surrounded by two sets of circular layers and is separated by little cytoplasm. The outer one is covered by an electron-lucent beaded layer (black arrow). A portion between two sets of layers is filled by fibrous structure (white arrow). (C) Tail bud (arrow) is formed from the posterior end of the nucleus. (D) Nuclear condensation of spermatid showing the specific patterns of its arrangement. Magnified view of a portion of spermatid nucleus showing the pattern of chromatin material in box. n = nucleus.