SEM of Neoechinorhynchus manubrianus: 13. Ventral view of the posterior end of a female specimen showing the position of the gonopore; 14. Enlargement of the posterior end of specimen in Fig. 13, showing the near terminal subterminal position of the crescent-shaped gonopore; 15. Ventro-lateral view of the bursa of a male specimen showing its bland appearance and articulation at an angle from the posterior trunk; 16. Near-ventral view of the same bursa in Fig. 15, showing its non-central orifice.