HYDROMEDUSAE. 749 



Fig. 4. Radial canals and the gonads (female), x 5. 



Fig. 5. The bulbs on the margin of the umbrella. Outer view, x 25. 



Fig. 6. A tentacle showing the inner view of the basal bulb, x 10. 



Fig. 7. A tentacle showing the outer view of the basal bulb, x 10. 



Fig. 8. A tentacle showing the lateral view of the basal bulb, x 10. 



Fig. 9. The oral lips. Outer view, x 10. 

 Figs. 10 — 15. Amphogoiui apsteini. (p. 739.) 



Fig. 10. A tentacle of Amplwgona apsteini. Outer view. 



Fig. 11. The external view of the spermary. 



Fig. 12. A section of the spermary. 



Fig. 13. The external view of the ovary. 



Fig. 14. A section of the ovarj'. 



Fig. 15. A sense organ, optical section, x 300. 



Fig. 16. Basal bulb of a tentacle of Phialidium terme. Outer view, x 65. 



96—2 



