BOUQAINVILLIA. 



71 



which this Medusa arises is represented in Fig. 93. There wo 

 see the little Jelly-fishes in different degrees of development on 



Fig. 94. Fig. 95. 



the stem, while in Figs. 94 97 they are given separately and 

 still more enlarged. In Fig. 94 the outline of the Jelly-fish is 

 still oval, the proboscis is but just formed, and the tentacles ap- 



Fig. 96. 



Fig. 97. 



pear only as round swellings or knobs. In Fig. 95 a depression 

 has taken place at the upper end, presently to be an opening, 

 the proboscis is enlarged, and the tentacles lengthened, but still 

 turned inward. In Fig. 96 the appendages of the proboscis are 

 quite conspicuous, the tentacles are turned outward, and the 



Figs. 94, 95, 96. Medusae buds of Fig 93, in different degrees of development. 

 Fig. 97. Young Medusa just freed from the Hydroid ; magnified. 



