174 



ZOOLOGY 



regular order, the stomodseum, and the four gastric ridges with 

 their septal funnels. The Scyphozoon-polype is called a scyphula 

 or scyphistoma. 



Fig. 129. — Aurelia aurita, development. A, planula, erroneously represented as completely 

 closed ; B, C, formation of stomodseum ; D, transverse section of young scyphula ; E, 

 scyphula ; P, longitudinal section of same : the section passes through a per-radius on the 

 left of the dotted line, through an inter-radius on the light ; G, division of scyphula 

 into ephyrulse ; H, ephyrula from the side ; L, the same from beneath. In A — D and 

 P the ectoderm is unshaded, the endoderm striated, and the mesoglcea dotted, a. lobes 

 of umbrella ; mnb. manubrium ; mth. mouth ; *../". septal funnel ; st. storuodajum ; t. tentacle ; 

 in. taniioles. (Prom Korschelt and Heider's Embryology.) 



The scyphula may grow to a height of half an inch, and some- 

 times multiplies by budding. After a time it undergoes a process 



