110 



HALF AN HOUR WITH JELLY-FISH. 



Thaumantia pilosel/a, 

 Fig. 58. 



upper end four gastrovascular canals (e) radiate 

 towards the margin of the disk, and communicate 

 with the circular marginal canal (d), which carries 

 the nutrient fluid right round the body. On either 



side of the radiating 

 canals are placed the 

 ovaries (e). The 

 action of the cilia and 

 the motion of this 

 nutrient fluid is beau- 

 tifully shown by the 

 microscope. The or- 

 gans both of sight 

 and hearing are be- 

 lieved by some natu- 

 ralists to exist in 

 these jelly-fish. 

 Thaumantia cymba- 

 loidea (Fig. 58) takes 

 its name from its 

 peculiar shape. In 

 Fig. 59 we have 

 another species of 

 jelly-fish (Turris 

 digitalis), usually 

 brightly and even brilliantly coloured. Whilst 

 some jelly-fish, such as the Physalia and Velella 

 drift towards our shores from the south, the Turris 

 visits us from the north, finding here its southern 

 boundary. It is, however, a much smaller object 



Thaumantia cymbaloidea. 



