Echinostoma sp. IG, microphotographs of live cercaria. A. Body, ventral view. B. Dorsal view showing para-oesophageal gland-cells and outlets (staining with Neutral Red) C. Tail, lateral view. D. Head collar, ventral view showing angle and lateral spines. E. Head collar, dorsal view, showing dorsal collar spines. Scale-bars: A, C, 100 μm; B, D, E, 50 μm.