PLATE XVIII 



Figs. 1-6. Tiaricodon coeruleus Browne. 

 Lateral view of an adult. 

 Lateral view of an intermediate stage. 

 Lateral view of an early stage. 

 A tentacle, contracted, belonging to an adult, outer (abaxial) 



view. 

 The mouth and its folded margin. Adult. 

 Aboral view of the stomach, showing the four lobes bearing 



gonads, upon the peduncle. Adult. 



Figs. 7-16. Aglauropsis conantii Browne. 

 Fig. 7. Lateral view of a large adult. 

 Fig. 8. Lateral view of an intermediate stage. 

 Fig. 9. Lateral view of an early stage. 

 Fig. 10. A gonad of an adult. 

 Fig. II. The base of the stomach when expanded. 

 Fig. 13. The base of the stomach when contracted. 

 Fig. 13. Radial section of a statocyst. 

 Fig. 14. A diagrammatical section of the margin, showing the position 



of the tentacles and the statocyst. ex, exumbrella; sub, 



subumbrella ; re, ring canal ; v, velum. 

 Fig. 15. The basal portion of a tentacle. 

 Fig. 16. The terminal portion of a tentacle. 



Figs. 17-19. Vallentinia falklandica Browne. 

 Fig. 17. Lateral view of type specimen. 

 Fig. 18. Diagram of one quadrant of the umbrella margin, showing the 



position of the tentacles. 

 Fig. 19. The adhesive disks of the perradial tentacles. 



