130 
oral end, leading into a stomodzeum and ccelenteron. 
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 ¢enzole. 
E 
pi- Hypo- 
Archenteron. blast. blast. 
CE@LENTERATA., 
Fig. 62.--THREE STAGES IN DEVELOPMENT OF AURELIA. 
(After G6TTE.) 
or septal funnels, grow down the interior of these ~mesenteries. 
polype has been termed a Scyphula, the presence of the teeniole and 
stomodzum constituting a resemblance to the preceding type (Actzxza). 
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. 
SS 
~] 
WZ 
Fig. 64.—TRANSVERSE SECTION THROUGH LOWER PART 
OF SCYPHULA LaRVA. 
Tnter-zadial 
Mesentery. Central Gastric 
Cavity. 
Radial Cavity. 
The eight primary 
Four hollow processes of epiblast, 
