360 BRITISH NAKED-EYED MEDUSA. 



PLATE I. 



Willsia CornuMca. 



Section of disc, to show the arrangement of the canals and 



tentacles. 

 Edge of disc, showing enlarged tentacles, all magnified. 

 Tima Forhesii. 



Part of the edge of disc, showing the arrangement of the 

 tentacles, both magnified. 

 ,, 5,Q. Goodsii'ea mirabilis : both kinds natural size. 

 „ 7. Part of the edge of the mantle, with upper part of large tentacle, 

 ocelli-like bulbs with smaller tentacles, and group of otolites, 

 all much enlarged. 

 ,, 8. Part of a large tentacle, showing bundles of thread cells. 

 „ 9. Some of the thread cells ; both much enlarged. 

 ,, 10. The peduncle, to show the constrictions and hole in the upper 

 part; magnified. 



PLATE 11. 



Figures 1, 3, 4, 5, 6. Staurophora Keithii : aU natural size. 



,, 2. Inside of upper part of the gastro-vascular canals, to show their 



junction. 

 „ 7. Edge of the mantle, showing arrangement of tentacles, ocelli, 



and smaller threads. 

 „ 8. Traced from Agassiz's plate of the mouth and stomach of 

 Staurophora laciniata, to compare with fig. 2. 



