Description A. Caudal end with paired testes, vitellaria and germaria. With unpaired seminal vesicle, tubiform copulatory organ and terminal gonopore. B. Seminal vesicle and copulatory organ. C. Two-split end of the copulatory organ with secretion. Sylt, surf zone of a sandy beach.Author Ax, 2008PNG file - 73.81 kB - 800 x 808 pixelsadded on 2017-04-07934 views This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 4.0 License