I30 



CCELENTERATA. 



oral end, leading into a stomodaeum and coelenteron. The eight primary 

 and eight secondary tentacles soon appear, and the ccelenteron becomes 

 divided into a central gastric cavity and four peripheral cavities by four 

 inter-radial mesenteries or taniolce. Four hollow processes of epiblast. 



Fig. 62. — Three Stages in Development of Aurelia. 



(After GoTTE.) 



or septal funnels, grow down the interior of these mesenteries. This 

 polype has been termed a Scyphula, the presence of the tseniote and 

 stomodaeum constituting a resemblance to the preceding type {Actinia). 

 The Scyphula grows in length and by transverse fission it sets free 



Fig. 63.- 



-Transverse Section through Upper Part 

 OF Scyphula Larva. 



Gullet. 



Radial Vascular 

 Cavity. 



Fig. 64. — Transverse Section through Lower Part 

 OF Scyphula Larva. 



I.iter-radial 



Mesentery, 



Central Gastric 

 Cavity. 



Radial Cavity, 



